Final answer:
To calculate the number of different combinations of adult and children's tickets that would total $100, we can set up an equation: 5x + 3y = 100. We can find possible values of 'x' and 'y' that satisfy the equation. There are 6 different combinations of adult and children's tickets that would have totaled $100.
Explanation:
To calculate the number of different combinations of adult and children's tickets that would total $100, we can set up an equation:
5x + 3y = 100
Where 'x' represents the number of adult tickets and 'y' represents the number of children's tickets. We need to find whole number solutions for 'x' and 'y'.
We can start by finding the possible values of 'x' and 'y' that satisfy the equation and add up to $100. The possible combinations are:
x = 0, y = 33
x = 5, y = 31
x = 10, y = 29
x = 15, y = 27
x = 20, y = 25
x = 25, y = 23
Therefore, there are a total of 6 different combinations of adult and children's tickets that would have totaled $100.
Use △DEF, shown below, to answer the question that follows:
What is the value of x rounded to the nearest hundredth? Type the numeric answer only in the box below.
Answer for Blank 1:
ANSWER
x=36.08 units
EXPLANATION
From the given right triangle,x is adjacent to the 49° angle.
The hypotenuse of the right triangle is 55 units.
Recall the mnemonics SOH-CAH-TOA
We use the cosine ratio,
[tex] \cos(49 \degree) = \frac{adjacent}{hypotenuse} [/tex]
[tex]\cos(49 \degree) = \frac {x}{55} [/tex]
Solve for x,
[tex]x = 55\cos(49 \degree) [/tex]
x=36.0832
Rounding to the nearest hundredth,we have
x=36.08
A frequency distribution for a bowl of coins is shown. Which set of raw data corresponds to this frequency distribution?
Answer:
A
Step-by-step explanation:
Pick a letter that's easy to count. I chose Q, because it has a tail below the baseline that makes them easy to spot.
Not C or D — too many quarters
Not B — too many nickels
It is often easier to find the correct answer choice by eliminating the bad choices, then seeing if what is left is consistent with the problem statement.
Choice A seems to have the right numbers of pennies and dimes (along with quarters and nickels).
Please help me with this !!
Answer:
[tex]\frac{11}{12}[/tex]
Step-by-step explanation:
Using the Pythagorean identity
sin²x + cos²x = 1, then
cosx = [tex]\sqrt{1-sin^2x}[/tex]
note that ([tex]\frac{\sqrt{23} }{12}[/tex] )² = [tex]\frac{23}{144}[/tex]
cosΘ = [tex]\sqrt{1-\frac{23}{144} }[/tex] = [tex]\sqrt{\frac{121}{144} }[/tex] = [tex]\frac{11}{12}[/tex]
Chords DB and MN intersect at the center of circle MBND. Which is the measure of the minor arc DM
Answer:
90
Step-by-step explanation:
DM=1/4 of MBND
a circle =360
360÷4=90
help please
The table shows ten random samples from two potato fields that were fertilized with two different fertilizers. Based on the mean of the data sets, which statement is true?
A) Fertilizer A produced a 15% greater yield
B) Fertilizer B produced a 15% greater yield
C) Fertilizer A produced a 3.0% greater yield
D) Fertilizer B produced a 3.0% greater yield
Answer:
Fertilizer B produced a 15% greater yield
Step-by-step explanation:
Mean yield fertilizer A = 20.2
Mean yield fertilizer B = 23.2
Thus, 23.2 − 20.2
20.2
= 0.1485 ≈ 0.15 or 15%
Answer : The correct option is, (B) Fertilizer B produced a 15% greater yield
Step-by-step explanation :
First we have to calculate the total yield of potato with fertilizer A.
Total yield of potato with fertilizer A = (27 + 20 + 16 + 18 + 22 + 19 + 23 + 21 + 17 + 19) kg
Total yield of potato with fertilizer A = 202 kg
Now we have to calculate the total yield of potato with fertilizer B.
Total yield of potato with fertilizer B = (28 + 19 + 18 + 21 + 24 + 20 + 25 + 27 + 29 + 21) kg
Total yield of potato with fertilizer B = 232 kg
Now we have to calculate the percent yield.
[tex]\text{Percent yield}=\frac{232-202}{202}\times 100[/tex]
[tex]\text{Percent yield}=14.85\% \approx 15\%[/tex]
From this we conclude that, the fertilizer B produced a 15% greater yield.
Hence, the correct option is, (B) Fertilizer B produced a 15% greater yield
Kim and ken are trying to earn at least $400 to buy a mountain bike. Kim earns $7 per hour as a youth counselor at camp. Ken earns $5 per hour mowing lawns. Let x = Kim's hours and y = Ken's hours. If ken works 40 hours, what is the least number of hours that ken will need to work to meet their goal?
Answer: 29 Hours of Work
Step-by-step explanation: Let's start by working backwards.. We know that Ken makes 5 dollars an hour, and he worked 40 hours. 5 * 40 = 200, and 400-200 = 200. This means that Kim has to work 200/7 hours, or (approximately) 29 hours of work.
Graph the system of equations. y=-1/2x+4 and x+2y=8
Answer:
Find the attached
Step-by-step explanation:
Graphing a system of equations can easily be done using modern technology graphing tools. Desmos graphing tool is the most widely used tool for this purpose.
The system of equations will be solved graphically. The point of intersection will be the solution if needed.
The attachment below shows the graph of the system of equations;
y=-1/2x+4 and x+2y=8
From the attachment below, we notice that the two lines are coincident. This is to mean that the two equations represent the same line.
rewrite the equation by completing the square 4x^2+20x+25=0
(x+__)^2=___
The equation [tex]\(4x^2 + 20x + 25 = 0\)[/tex] rewritten by completing the square is [tex]\((x + \frac{5}{2})^2 = \frac{25}{4}\)[/tex] , and the solutions are (x = 0) and (x = -5).
Sure, let's complete the square for the given quadratic equation [tex]\(4x^2 + 20x + 25 = 0\).[/tex]
1. First, let's divide the entire equation by 4 to simplify the coefficients:
[tex]\[x^2 + 5x + \frac{25}{4} = 0\][/tex]
2. Now, let's focus on completing the square for the quadratic term[tex]\(x^2 + 5x\).[/tex] To do this, we need to add and subtract the square of half of the coefficient of (x):
[tex]\[x^2 + 5x + \left(\frac{5}{2}\right)^2 - \left(\frac{5}{2}\right)^2 + \frac{25}{4} = 0\][/tex]
3. Simplify the expression inside the parentheses:
[tex]\[x^2 + 5x + \frac{25}{4} - \frac{25}{4} + \frac{25}{4} = 0\][/tex]
4. Combine like terms:
[tex]\[x^2 + 5x + \frac{25}{4} - \frac{25}{4} = 0\][/tex]
5. Now, we have a perfect square trinomial on the left side:
[tex]\[\left(x + \frac{5}{2}\right)^2 - \left(\frac{5}{2}\right)^2 = 0\][/tex]
6. Finally, let's simplify:
[tex]\[\left(x + \frac{5}{2}\right)^2 - \frac{25}{4} = 0\][/tex]
7. To isolate \(x\), add \(\frac{25}{4}\) to both sides:
[tex]\[\left(x + \frac{5}{2}\right)^2 = \frac{25}{4}\][/tex]
8. Now, take the square root of both sides:
[tex]\[x + \frac{5}{2} = \pm \sqrt{\frac{25}{4}}\][/tex]
9. Simplify the square root:
[tex]\[x + \frac{5}{2} = \pm \frac{5}{2}\][/tex]
10. Subtract[tex]\(\frac{5}{2}\)[/tex] from both sides to solve for (x):
[tex]\[x = -\frac{5}{2} \pm \frac{5}{2}\][/tex]
11. Simplify further:
[tex]\[x = -\frac{5}{2} + \frac{5}{2} \text{ or } x = -\frac{5}{2} - \frac{5}{2}\][/tex]
12. This gives us the solutions:
[tex]\[x = 0 \text{ or } x = -5\][/tex]
So, the equation [tex]\(4x^2 + 20x + 25 = 0\)[/tex] rewritten by completing the square is[tex]\((x + \frac{5}{2})^2 = \frac{25}{4}\),[/tex] and the solutions are (x = 0) and (x = -5).
Complete question:
Rewrite the equation by completing the square 4x^2+20x+25=0
(x+__)^2=___
A brand of cereal had 1.2 milligrams of iron per serving. Then they changed their recipe so they had 1.8 mg of iron per serving. What was the percent increase in iron?
Answer:
50%
Step-by-step explanation:
The percent increase is found by first finding the difference between the two values and then dividing that difference by the original amount. Then to get the percentage, multiply by 100. For us, that looks like this:
[tex]\frac{1.8-1.2}{1.2}[/tex]
Do the subtraction to get
[tex]\frac{.6}{1.2}[/tex]×100
And that comes out to 50%.
The graph of y = tan (x − π / 2) compared to the graph of y = tan x has:
moved π / 2 units left
moved π / 2 units down
moved π / 2 units up
moved π / 2 units right
Answer:
Last Option moved [tex]\frac{\pi}{2}[/tex] units right
Step-by-step explanation:
If we have a function f(x) and we want to move it horizontally then we make the transformation:
[tex]y = f (x + h)[/tex]
If [tex]h <0[/tex] then the graph of f(x) moves horizontally h units to the right
If [tex]h> 0[/tex] then the graph of f(x) moves horizontally h units to the left.
In this case we have the function [tex]y = tan (x)[/tex] and the transformation is performed to obtain [tex]y = tan(x- \frac{\pi}{2})[/tex]
Notice that in this transformation
[tex]h <0 = -\frac{\pi}{2}[/tex]
Then the graph of [tex]y = tan (x)[/tex] moves horizontally [tex]\frac{\pi}{2}[/tex] to the right
The graph of y = tan (x − π / 2) has moved π / 2 units right compared to y = tan x.
Explanation:The graph of y = tan (x − π / 2) compared to the graph of y = tan x has moved π / 2 units right.
The function y = tan (x − π / 2) is obtained by shifting the graph of y = tan x horizontally to the right by π / 2 units. The minus sign in (x − π / 2) indicates a rightward shift.
So, the correct answer is that the graph of y = tan (x − π / 2) has moved π / 2 units right.
Learn more about Graph transformations here:https://brainly.com/question/19040905
#SPJ12
Which congruence postulate is stated below If speak two angles and a non included side of one triangle are congruent to the corresponding two angles and side of another, then the triangles are congruent
Answer:
AAS
Step-by-step explanation:
Triangle congruence or congruent triangles are defined as triangles that are similar in size and shape. The corresponding sides of the triangle if are equal, then the corresponding angles will be equal.
In the given question, the two angles and non-included sides of one triangle are congruent to the corresponding two angles and sides of the other triangle.
The given congruency explains the AAS congruency theorem.
The AAS theorem can be explained as:
1. AAS stands for Angle-angle-side.
2. It states that for the triangle having two pairs of congruent angles and a non-common side is congruent to the corresponding side and angles, then triangles are said to be congruent.
Thus, the given example shows the AAS congruent theorem.
To know more about congruency, refer to the following link:
https://brainly.com/question/19258025
Please help me with this
Answer:
[tex]\dfrac{4000\pi}{3}[/tex] ft³
Step-by-step explanation:
First, let's figure out how to get the volume of a sphere from its surface area. If r is the radius of our sphere, then
The formula for a sphere's surface area is [tex]A = 4\pi r^2[/tex]
The formula for a sphere's volume is [tex]V=\frac{4}{3}\pi r^3[/tex]
So to get from area to volume, we have to divide the area by 3 and then multiply it by r. Mathematically:
[tex]V=\frac{A}{3}r[/tex]
Before we solve for V though, we need to find the radius of our sphere. Thankfully, we're given the surface area - [tex]400\pi[/tex] ft² - so we can use the area formula to find that radius:
[tex]A=4\pi r^2=400\pi\\r^2=100\\r=10[/tex]
And now that we have our radius, we can put it into our volume formula to find
[tex]V=\frac{A}{3} r=\frac{400\pi}{3}(10)=\frac{4000\pi}{3}[/tex] ft³
Could I get some help on these two Trig problems?
State the trigonometric ratios for the triangle below.
Sin ϴ = 12/13 Cos ϴ = 5/13 Tan ϴ = 12/5
Sin ϴ = 12/5 Cos ϴ = 5/13 Tan ϴ = 12/13
Sin ϴ = 5/13 Cos ϴ = 12/13 Tan ϴ = 5/12
Sin ϴ = 5/13 Cos ϴ = 12/13 Tan ϴ = 12/5
State the trigonometric ratios for < A in the triangle below.
Sin A = 4/5 Cos A = 3/5 Tan A = 4/3
Sin A = 3/5 Cos A = 4/5 Tan A = 4/3
Sin A = 3/5 Cos A = 4/3 Tan A = 4/5
Sin A = 3/5 Cos A = 4/5 Tan A = 3/4
Answer:
Part 1) Sin ϴ = 5/13, Cos ϴ = 12/13, Tan ϴ = 5/12
Part 2) Sin A = 4/5, Cos A = 3/5,Tan A = 4/3
Step-by-step explanation:
we know that
In a right triangle
The function sine of an angle is equal to divide the opposite side to the angle by the hypotenuse
The function cosine of an angle is equal to divide the adjacent side to the angle by the hypotenuse
The function tangent of an angle is equal to divide the opposite side to the angle by the adjacent side to the angle
Part 1)
Find the Sin ϴ
Sin ϴ=5/13
Find the Cos ϴ
Cos ϴ=12/13
Find the Tan ϴ
Tan ϴ=5/12
Part 2) we know that
In the right triangle ABC
Applying the Pythagoras Theorem
Find the hypotenuse AB
[tex]AB^{2}=6^{2}+8^{2}[/tex]
[tex]AB^{2}=100[/tex]
[tex]AB=10\ units[/tex]
Find the Sin A
Sin A=8/10=4/5
Find the Cos A
Cos A=6/10=3/5
Find the Tan A
Tan A=8/6=4/3
Answer:
Question 1: Sin ϴ = 5/13, Cos ϴ = 12/13, Tan ϴ = 5/12
Question 2: Sin A = 4/5, Cos A = 3/5,Tan A = 4/3
Step-by-step explanation:
Here's proof showing that one of the questions is right. Hope this helps!
Please show work on these questions!!!
Find the radian measure of an angle of -280 degrees.
Find the degree measure of an angle of 3pi/5 radians.
Find the exact values of cos(3pi/4 radians) and sin(3pi/4 radians).
Answer:
- 14π/9; 108°; -√2/2; √2/2
Step-by-step explanation:
To convert from degrees to radians, use the unit multiplier [tex]\frac{\pi }{180}[/tex]
In equation form that will look like this:
- 280° × [tex]\frac{\pi }{180}[/tex]
Cross canceling out the degrees gives you only radians left, and simplifying the fraction to its simplest form we have [tex]-\frac{14\pi }{9}[/tex]
The second question uses the same unit multiplier, but this time the degrees are in the numerator since we want to cancel out the radians. That equation looks like this:
[tex]\frac{3\pi }{5}[/tex] × [tex]\frac{180}{\pi }[/tex]
Simplifying all of that and canceling out the radians gives you 108°.
The third one requires the reference angle of [tex]\frac{3\pi }{4}[/tex].
If you use the same method as above, we find that that angle in degrees is 135°. That angle is in QII and has a reference angle of 45 degrees. The Pythagorean triple for a 45-45-90 is (1, 1, √2). But the first "1" there is negative because x is negative in QII. So the cosine of this angle, side adjacent over hypotenuse, is [tex]-\frac{1}{\sqrt{2} }[/tex]
which rationalizes to [tex]-\frac{\sqrt{2} }{2}[/tex]
The sin of that angle is the side opposite the reference angle, 1, over the hypotenuse of the square root of 2 is, rationalized, [tex]\frac{\sqrt{2} }{2}[/tex]
And you're done!!!
1 Geometry question will give Brainliest!!! (photo attached)
the answer is....... 56%
A. 56%
First, find the number in the cell that is in the row “Hiked” and the column “Poison ivy rash”. There is only one that matches this description, and it contains the number 0.56.
To convert a decimal number to a percentage, multiply it by 100, or move the decimal point two places to the right, which is essentially the same thing. This gives you 56, which means the answer is 56%.
a ferris wheel has 15 seat buckets . What is the angle measurement between each bucket?
Answer:
24 degrees
Step-by-step explanation:
A Ferris wheel is in the shape of a circle. Having 15 seat buckets means that the circle will be divided into 15 sections. Keep in mind that we are assuming that the seat buckets are equally spaced.
We know that:
Degrees in one circle: 360 degree
Dividing in 15 sections:
[tex]=\frac{360}{15}\\=24\ degrees[/tex]
So the angle of measurement between the seat buckets is 24 degrees ..
A party-favor bag must have a volume of 140 cubic inches and the dimensions that are shown below. The equation x3+6x2-27x=140 can be used to find x.
What are the dimensions of the party-favor bag? Use a graphing calculator and a system of equations to find the answer.
The length is 7 inches, the width is 4 inches, and the height is 16 inches.
The length is 5 inches, the width is 2 inches, and the height is 14 inches.
The length is 4 inches, the width is 1 inch, and the height is 13 inches.
The length is 3 inches, the width is 0 inches, and the height is 12 inches.
Answer:
B The length is 5 inches, the width is 2 inches, and the height is 14 inches.
Step-by-step explanation:
The equation that desribes the volume of a party-favor bag is
[tex]x^3+6x^2-27x-140=0.[/tex]
The solutions of theis equation can be found among divisors of -140. The divisors are:
[tex]\pm1, \pm2, \pm4, \pm5, \pm 7,\pm 10, \pm 14, \pm 20, \pm 35, \pm 70, \pm 140.[/tex]
Note that
[tex]5^3+6\cdot 5^2-27\cdot 5-140=125+150-135-140=275-275=0,[/tex]
so
[tex]x=5[/tex]
is the solution of the equation.
Hence,
the length is 5 inches, the width is 5-3=2 inches and the height is 5+9=14 inches.
Answer:
B. The length is 5 inches, the width is 2 inches, and the height is 14 inches.
Step-by-step explanation:
Two students are reading a novel. Ashley reads 10 pages per day. Carly reads 8 pages per day , but she started early and is already on page 40. Write a system of equations to reprsent the situation, using d for days and p for pages.
Answer:
For Ashley, p=10d+0
For Carly, p=8d+40
Step-by-step explanation:
Ashley: The slope is 10 (pages) times how many days have passed.
Her y-intercept is 0 because that is how many pages she read before starting.
P is the y-value because solving the equation (putting a number in for how many days it's been) will give you the number of pages she read.
Carly: The slope is 8 (pages) times how many days have passed.
Her y-intercept is 40 because that is how many pages she read before starting reading 8 per day.
System of equations to represent the situation, using d for days and p for pages are (p = 10d) and (p = 8d + 40) and this can be determined by using the given data.
Given :
Two students are reading a novel. Ashley reads 10 pages per day. Carly reads 8 pages per day, but she started early and is already on page 40.The following steps can be used to determine the system of equations:
Step 1 - According to the given data, Ashley reads 10 pages per day. So, the slope of the linear equation that represents this situation is 10 and it is given by:
p = 10d
where 'p' is the number of pages and 'd' is the total number of days.
Step 2 - According to the given data, Carly reads 8 pages per day, but she started early and is already on page 40. So, the slope of the linear equation that represents this situation is 8 and it is given by:
p = 8d + 4
For more information, refer to the link given below:
https://brainly.com/question/13911928
Step 1 - According to the given data, Ashley reads 10 pages per day. So, t Ste he slope of the linear equation that represent this situat
Divide and simplify completely. Assume that no denominator equals zero. d^2-1/d^2-d divided by d+1/d-1
recall that
1² = 1
1⁴ = 1
1¹⁰⁰⁰⁰⁰⁰⁰⁰⁰ = 1
[tex]\bf \cfrac{d^2-1}{d^2-d}\div \cfrac{d+1}{d-1}\implies \cfrac{d^2-1}{d^2-d}\cdot \cfrac{d-1}{d+1}\implies \cfrac{\stackrel{\stackrel{\textit{difference of}}{\textit{squares}}}{d^2-1^2}}{d(d-1)}\cdot \cfrac{d-1}{d+1} \\\\\\ \cfrac{\begin{matrix} (d+1) (d-1) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}{d~~\begin{matrix} (d-1) \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}\cdot \cfrac{d-1}{\begin{matrix} d+1 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix} }\implies \cfrac{d-1}{d}[/tex]
The graph of a function is shown. Which function is graphed?
Answer:
A) y = sin(x) +1
Step-by-step explanation:
The centerline of the function is at +1, so choices B and D are eliminated.
The function value is at the centerline at x=0, so choice C is eliminated.
The appropriate choice is A:
y = sin(x) +1
Answer:
Step-by-step explanation:
Given is a graph whichis symmetrical about y =1 and periodical with period 2pi
Amplitude is 1
Since amplitude is 1,
sinx has coefficient 1
Since symmetrical about y =1
we have[tex]y=sinx +1[/tex]
There is no horizontal shift and also x has coefficient 1 since period = 2pi
In other words, this graph given is obtained as a transformation of y=sinx vertically up by 1 units.
Hence equation would be
y=sinx +1
Using a directrix of y = 5 with focus at (4, 1), what quadratic function is created?
f(x) = 1/4(x − 4)2 − 3
f(x) = 1/8(x + 4)2 − 3
f(x) = −1/8(x − 4)2 + 3
f(x) = -1/4(x + 4)2 − 3
Answer:
C
Step-by-step explanation:
From any point (x, y) on the parabola the focus and directrix are equidistant.
Using the distance formula
[tex]\sqrt{(x-4)^2+(y-1)^2}[/tex] = | y - 5 |
Squaring both sides
(x - 4)² + (y - 1)² = (y - 5)² ← distribute the factors in y
(x - 4)² + y² - 2y + 1 = y² - 10y + 25 ( subtract y² - 10y + 25 from both sides )
(x - 4)² + 8y - 24 = 0 ( subtract (x - 4)² from both sides )
8y - 24 = - (x - 4)² ← add 24 to both sides )
8y = - (x - 4)² + 24 ( divide both sides by 8 )
y = - [tex]\frac{1}{8}[/tex] (x - 4)² + 3
Hence
f(x) = - [tex]\frac{1}{8}[/tex] (x - 4)² + 3 → C
ABC and AED are straight lines.
BE and CD are parallel.
AC = 12.3cm
AB = 8.2cm
BE = 3.8cm
a) Work out length CD.
AD = 9.15cm
b) Work out length ED.
Answer:
CD = 5.7 cmED = 3.05 cmStep-by-step explanation:
a) ΔACD ~ ΔABE so the ratios of corresponding sides are the same. That is ...
CD/BE = CA/BA
CD/3.8 = 12.3/8.2
CD = 3.8×12.3/8.2 = 5.7 . . . . cm
__
b) As above, the ratios of corresponding sides are the same.
ED/AD = BC/AC
ED/9.15 = (12.3-8.2)/12.3 . . . . BC = AC - AB
ED = 9.15×4.1/12.3 = 3.05 . . . . cm
Applying the knowledge of similar triangles to find the missing lengths:
a. the length of CD = 5.7 cm
b. the length of ED = 3.05 cm
The information for this problem has been put into a diagram for easy understanding (see attachment below).
Apply the knowledge of similar triangles to workout the lengths of CD and ED respectively.
Note:
Similar triangles will have the ratio of their corresponding sides equal to each other.Triangle ABE and triangle ACD are similar triangles.Since Triangles ABE and ACD are similar triangles, therefore:
AB/AC = AE/AD = BE/CDa. Find the length of CD:
Use AB/AC = BE/CDAB = 8.2 cm
AC = 12.3 cm
BE = 3.8 cm
CD = ?
Substitute:[tex]\frac{8.2}{12.3} = \frac{3.8}{CD}[/tex]
Cross multiply[tex]\frac{8.2}{12.3} = \frac{3.8}{CD}\\\\CD = \frac{3.8 \times 12.3}{8.2} = 5.7 $ cm[/tex]
b. Find the length of ED:
ED = AD - AEAD = 9.15 cm
Let's find AE:AB/AC = AE/AD
Substitute[tex]\frac{8.2}{12.3} = \frac{AE}{9.15}[/tex]
Cross multiply[tex]AE = \frac{8.2 \times 9.15}{12.3} = 6.1 $ cm[/tex]
ED = AD - AE
SubstituteED = 9.15 - 6.1 = 3.05 cm
Therefore, applying the knowledge of similar triangles to find the missing lengths:
a. the length of CD = 5.7 cm
b. the length of ED = 3.05 cm
Learn more here:
https://brainly.com/question/16956655
Which of these r-values represents the strongest correlation?
–0.9, –0.6, 0.2, 0.7
a. -0.9
b. -0.6
c. 0.2
d. 0.7
Answer:
a. -0.9
Step-by-step explanation:
The closer you get to 1, either positive or negative, the stronger the correlation
-.9 is closest to -1, so it has the strongest negative correlation
.9 cause it basically has the highest absolute value.
Use substitution to solve the following system of equations.-3x - 4y = 2−3x−4y=2minus, 3, x, minus, 4, y, equals, 2-5 = 5x + 5y−5=5x+5y
Answer:
The solution to this system is (-2,1)
Step-by-step explanation:
The given system of equations is;
[tex]-3x-4y=2[/tex]...eqn1
and
[tex]-5=5x+5y[/tex]....eqn2
We make y the subject of the second equation to get:
[tex]-5y=5x+5[/tex]
[tex]\implies y=-x-1[/tex]...eqn3
We put eqn3 into eqn1 to get;
[tex]-3x-4(-x-1)=2[/tex]
We expand to get:
[tex]-3x+4x+4=2[/tex]
[tex]-3x+4x=2-4[/tex]
Simplify both sides to get:
[tex]x=-2[/tex]
Put x=-2 into eqn3
[tex]\implies y=--2-1[/tex]
[tex]\implies y=1[/tex]
The solution to this system is therefore (-2,1)
Ruth Barr rented a car for 5 days at 59.95 per day with unlimited mileage she drove 1156 miles and paid 137.76 for gasoline. What was the total cost per mile to rent the car
The total cost per mile to rent the car was approximately $0.378, calculated by summing up the rental and gasoline costs and then dividing by the total number of miles driven.
Explanation:The total cost per mile to rent the car can be calculated by summing up the cost of renting the car and the cost of gasoline, then dividing by the total number of miles driven.
Calculate the total cost of renting the car: 5 days × $59.95 per day = $299.75.Add the cost of gasoline: $299.75 + $137.76 = $437.51.Divide the total cost by the number of miles driven to find the cost per mile: $437.51 ÷ 1156 miles = approximately $0.378 per mile.Therefore, the total cost per mile to rent the car was approximately $0.378.
Final answer:
To find the total cost per mile to rent the car, add the rental cost for 5 days to the gasoline cost, then divide by the miles driven. Ruth Barr's total cost per mile was approximately $0.3785.
Explanation:
To calculate the total cost per mile to rent the car, we need to add the cost of renting the car for 5 days to the cost of gasoline and then divide the sum by the number of miles driven.
Calculate the rental cost for 5 days: 5 days × $59.95/day = $299.75.
Add the cost for gasoline: $299.75 (rental cost) + $137.76 (gasoline) = $437.51.
Divide the total cost by the number of miles driven: $437.51 ÷ 1156 miles = approximately $0.3785 per mile.
The total cost per mile Ruth Barr spent to rent the car was approximately $0.3785.
There is a hole in Mr. Smith's backyard. He wants to find out how wide the hole is. From the point where Mr. Smith is standing, he measures 20 and 25. How wide is the hole?
a2 + b2 = c2
A) 10
B) 15
C) 20
D) 90
The answer is:
The correct option is:
B) 15
Why?To solve the problem, we need to use the Pythahorean Theorem. We know that we can use the theorem since we are working with a right triangle as we can see in the picture.
So, we are given the following information:
[tex]Hypothenuse=c=25units\\\\Opposite=b=20units[/tex]
Now, using the Pythagorean Theorem, we have:
[tex]c^{2}=a^{2} +b^{2} \\\\25^{2}=a^{2}+20^{2}\\\\a^{2}=25^{2}-20^{2}=225\\\\a=\sqrt{225}=15[/tex]
Hence, we have that the correct option is:
B) 15
Have a nice day!
One pump can fill a tank with oil in 10 hours. Together with a second pump, it can fill the tank in 6 hours. How long will it take the second pump to fill the tank if it is used alone?
Answer:
The first pump can do 1/0 of the work per hour
Together they do 1/6 of the work per hour
The second alone would do (1/6 - 1/10) of the work per hour.
1/6 - 1/10 = 1/15
The second pump would take 15 hours to do the work.
C) 15
Hope this helps. :)
Answer:
The second pump can fill a tank with oil in 15 hours.
Step-by-step explanation:
It is given that one pump can fill a tank with oil in 10 hours. Together with a second pump, it can fill the tank in 6 hours.
Let the second pump can fill a tank with oil in t hours.
One hour work of first pump is [tex]\frac{1}{10}[/tex].
One hour work of second pump is [tex]\frac{1}{t}[/tex].
One hour work of both pump together is [tex]\frac{1}{6}[/tex].
1 hour work of both = 1 hour work of 1st pump + 1 hour work of 2nd pump
[tex]\frac{1}{6}=\frac{1}{10}+\frac{1}{t}[/tex]
[tex]\frac{1}{6}=\frac{t+10}{10t}[/tex]
Cross multiply.
[tex]10t=6(t+10)[/tex]
[tex]10t=6t+60[/tex]
Subtract 6t from both the sides.
[tex]10t-6t=60[/tex]
[tex]4t=60[/tex]
Divide both the sides by 4.
[tex]t=15[/tex]
Therefore the second pump can fill a tank with oil in 15 hours.
79 points for one question help
Answer:
x = 42
Step-by-step explanation:
The angle between the tangent and the secant is
[tex]\frac{1}{2}[/tex] difference of the measure of the intercepted arcs, that is
x = 0.5( 136 - 52) = 0.5 × 84 = 42
Answer:
[tex]\Large \boxed{\sf 42}[/tex]
Step-by-step explanation:
Apply tangent secant exterior angle measure theorem
If a tangent and a secant intersect in the exterior of a circle, then the measure of the angle formed is 1/2 the difference of the measures of its intercepted arcs.
[tex]\displaystyle \frac{1}{2} \times(136-52)=42[/tex]
A hot air balloon descends to the ground. The function a(t) = 210 – 15t can be used to describe the altitude of the balloon as it approaches the ground. The time is in minutes.
What does t represent?
What does a(t) represent?
What information will a(5.5) give?
On Edge the answers are 1. time after the balloon begins to descend 2. altitude of the balloon 3. altitude of the balloon after 5.5 minutes.
In the given function, 't' represents time in minutes since the start of the balloon's descent. The function 'a(t)' represents the balloon's altitude above ground at a given time. 'a(5.5)' gives the altitude of the balloon 5.5 minutes after the descent started.
Explanation:In your problem, t represents time in minutes since the balloon began its descent. The function a(t) represents the altitude in feet of the hot air balloon above the ground at a given time t in minutes. a(5.5) gives the altitude of the balloon 5.5 minutes after it started descending.
Specifically, you can find the altitude at any given time by replacing 't' in the equation with the number of minutes. For instance, to find the altitude after 5.5 minutes (a(5.5)), you would replace 't' with '5.5' in the equation (a(t) = 210 – 15t), which will give you the altitude of the balloon after 5.5 minutes of descent.
Learn more about Function Interpretation here:https://brainly.com/question/30597508
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Please help me out with this
Answer:
FG=13
Step-by-step explanation:
We can make an equation that looks like this:
EF+FG=EG
Then, we can substitute in the numbers we know:
12+FG=25
Then solve:
FG=25-12
FG=13
Hope I helped soz if I'm wrong ouo.
~Potato.
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Trademark ~Potato. 2019.
Answer:
FG = 13
Step-by-step explanation:
We can write
EF + FG = EG ← substitute values
12 + FG = 25 ( subtract 12 from both sides )
FG = 25 - 12 = 13