Answer:
The scale factor is 1.5
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor
so In this problem
Let
z -----> the scale factor
[tex]z=\frac{B'C'}{BC}=\frac{C'D'}{CD}=\frac{D'A'}{DA}=\frac{A'B'}{AB}[/tex]
substitute the values
[tex]z=\frac{3}{2}=\frac{4.5}{3}=\frac{4.5}{3}=\frac{4.5}{3}[/tex]
therefore
[tex]z=1.5[/tex]
The scale factor is 1.5
Which method is the most effective method to use to solve x^2+4x+3=0
Answer:
Completing the square.
Step-by-step explanation:
since there is no "a" term and the bx term is even, completing the square is your best bet.
For this case we have as a simpler method the factorization. We must find two numbers that multiplied as a result +3 and added as a result +4.
These numbers are:
3 and 1.[tex]3 + 1 = 4\\\\3 * 1 = 3[/tex]
So, we have to:
[tex]x ^2 + 4x + 3 =\\(x + 3) (x+1)[/tex]
Answer:
[tex](x + 3) (x + 1)[/tex]
The model represents an equation. What value of x makes the equation true?
when all goes wrong...choose c my friend.
The number of eggs in the refrigerator e decreased by 5 equals 18
Answer:
e=23
Step-by-step explanation:
The equation representing this scenario is e-5=18.
Add 5 to both sides and you get e=23 (eggs)
Answer:
e=23
Step-by-step explanation:
The terms of a sequence increase by a constant amount. If the first term is 7 and the fourth term is 16: list the first six terms of the sequence
Answer:
Step-by-step explanation:
s = sequence
[tex]s_{1}[/tex] = first term of sequence
[tex]s_{1}[/tex] = 7
[tex]s_{4}[/tex] = 16
Find the difference between the term number and the values.
Terms:
4 - 1 = 3
Values:
16 - 7 = 9
For every 3 terms, you add 9.
Divide, to find the amount you add for 1 terms.
3 / 3 = 1
9 / 3 = 3
For every 1 terms, you add 3.
Answer:[tex]s_{1}[/tex]= 7
[tex]s_{2}[/tex]= 10
[tex]s_{3}[/tex]= 13
[tex]s_{4}[/tex]= 16
[tex]s_{5}[/tex]= 19
[tex]s_{6}[/tex]= 22
Lines a and b are perpendicular. The slope of line a is −2. What is the slope of line b?
Answer:
1/2
Step-by-step explanation:
if the one line's slope is m = –2, then the perpendicular line's slope will be m= 1/2 (the slope of a perpendicular line is the reciprocal of the slope of the first line)
Answer:
[tex]\frac{1}{2}[/tex]
Step-by-step explanation:
I will call [tex]m_{a}[/tex] the slope of line [tex]a[/tex], and [tex]m_{b}[/tex] the slope of line [tex]b[/tex].
For two lines to be perpendicular, the following must be satisfied:
[tex]m_{a}*m_{b}=-1[/tex]
in this case we know:
[tex]m_{a}=-2[/tex]
so:
[tex](-2)*m_{b}=-1[/tex]
And clearing for the slope of line [tex]b[/tex]:
[tex]m_{b}=\frac{-1}{-2} \\m_{b}=\frac{1}{2}[/tex]
The slope of the line [tex]b[/tex] which is perpendicular to line [tex]a[/tex] is [tex]\frac{1}{2}[/tex]
An egg is dropped from the window of a building. The height, in feet, of the egg t seconds after it is thrown is represented by d=-16t^2-7t+61. How many seconds after the egg is thrown will it be 10 feet from the ground?
Answer:
1.58
Step-by-step explanation:
Okay. We're solving for t because we need to know how many seconds. From the problem, we know the height (10), but we don't know when that height happens.
[tex]10 = -16tx^{2} -7t+61[/tex]
We can factor by multiplying -16 by 61 first to get -976 and see what multiplies to get -976 AND adds to get -7 at the same time. But we can also use the quadratic formula because, let's be honest, factoring can be a lot of extra work.
[tex]10 = -16t^{2} -7t+61\\\\0 = -16t^{2} -7t+51\\\\t=\frac{-b\pm \sqrt{b^{2}-4ac } }{2a} \\=\frac{-(-7)\pm \sqrt{(-7)^{2}-4(-16)(51) } }{2(-16)} \\=\frac{7\pm \sqrt{49+64(51) } }{-32} \\=\frac{7\pm \sqrt{3313} }{-32}[/tex]
Plug both the plus and the minus versions into your calculator and...
[tex]t\approx -2.02, 1.58[/tex]
There's no such thing as negative time, so -2.02 is automatically disqualified, leaving 1.58 as the answer.
Hope this helps, let me know if I missed anything!
The time takes for the egg to reach the height 10 feet from the ground on the basis of the given quadratic equation will be 1.58 seconds.
What is a quadratic equation?An algebraic equation of the second degree in x is a quadratic equation. The quadratic equation is written as ax2 + bx + c = 0, where x is the variable, and a must not be zero.
For example, 3x² + 6x + 8 = 0 here x has the highest term as 2 and the coefficient of x² is not zero.
As per the given quadratic equation,
d = - 16t² - 7t + 61
The time t in seconds at d = 10
-16t² - 7t + 61 = 10
16t² + 7t - 51 = 0
The roots of the above quadratic equation will be,
t = [-7 ± √(7² - 4 × 16 × -51 )] /(2 × 16)
t = (-7 ± 57.586)32
t = 1.58 or -2.02
Since, time is always positive thus, t = 1.58 seconds.
Hence "The time takes for the egg to reach the height 10 feet from the ground on the basis of the given quadratic equation will be 1.58 seconds".
For more about the quadratic equation,
https://brainly.com/question/17177510
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(4,?) is on the line below. Find the other half of the coordinate. y=3/4x+3. Solve
Answer:
y = 6
Step-by-step explanation:
Given
y = [tex]\frac{3}{4}[/tex] x + 3 and (4, ? )
Substitute the x- coordinate x = 4 into the equation for corresponding value of the y- coordinate.
x = 4 : y = [tex]\frac{3}{4}[/tex] × 4 + 3 = 3 + 3 = 6
Hence the coordinate point is (4, 6)
someone help me out here asap the formula is v=lwh?
Answer:
V=8xxxyyy=8x³y³
Step-by-step explanation:
In the question, V=lwh, the value for l is given to us as 2xy. Because it is a cube, all of the length of the edges are the same, so l=w=h, which means w=2xy and h=2xy.
Plug in w=2xy h=2xy l=2xy into the equation V=lwh.
V=2xy·2xy·2xy
V=(2·2·2)(x·x·x)(y·y·y)
V=8xxxyyy=8x³y³
Plz help!!!!!!!!!!!!!!!
Answer: b) (x - 2)(x + 1)(x + 3) = 0
Step-by-step explanation:
Look at the graph to find the x-intercepts (where the graph crosses the x-axis).
x = 2, x = -1, and x = -3
Rewrite them as factors:
x - 2 = 0, x + 1 = 0, and x + 3 = 0
Combine the factors through multiplication:
(x - 2) (x + 1) (x + 3) = 0
which do you think is greater , 4 x 3 2/5 or 3 x 4 2/5
Answer:
[tex]4(3\frac{2}{5})[/tex] is greater
Step-by-step explanation:
step 1
we have
[tex]4(3\frac{2}{5})[/tex]
convert to an improper fraction
[tex]3\frac{2}{5}=\frac{3*5+2}{5}=\frac{17}{5}[/tex]
so
[tex]4(3\frac{2}{5})=4(\frac{17}{5})=\frac{68}{5}[/tex]
step 2
we have
[tex]3(4\frac{2}{5})[/tex]
convert to an improper fraction
[tex]4\frac{2}{5}=\frac{4*5+2}{5}=\frac{22}{5}[/tex]
so
[tex]3(4\frac{2}{5})=3(\frac{22}{5})=\frac{66}{5}[/tex]
therefore
[tex]4(3\frac{2}{5})[/tex] is greater
Final answer:
After converting mixed numbers to improper fractions and multiplying, it is clear that 4 x [tex]3\frac{2}{5}[/tex] is greater than 3 x [tex]4\frac{2}{5}[/tex].
Explanation:
The question asks which is greater: 4 x [tex]3\frac{2}{5}[/tex] or 3 x [tex]4\frac{2}{5}[/tex]. Let's compare these two expressions
First, convert the mixed numbers to improper fractions:
[tex]3\frac{2}{5}[/tex] = (3x5 + 2)/5 = 17/5
[tex]4\frac{2}{5}[/tex] = (4x5 + 2)/5 = 22/5
Next, multiply each by the whole number:
4 x 17/5 = 68/5 = 13.6
3 x 22/5 = 66/5 = 13.2
Therefore, 4 x [tex]3\frac{2}{5}[/tex] is greater than 3 x [tex]4\frac{2}{5}[/tex].
All dogs are animals.
Some animals are pets.
------------------
Therefore, some dogs are pets.
Vaild or Invalid?
This is valid.
.
.
.
.
.
Sequence of 2,4,7,17,33 what is the next term after 33
Answer:67
Step-by-step explanation:
Whats the probability
You roll a number cube. You roll a number that is greater than 2 and less then 5
Answer: 2/6.
Step-by-step explanation:
This might be wrong but because there are only 6 sides on a number cube, and only two numbers between this probablity this is the most likely correct answer. I apologize if this is wrong.
If 12x-8=24 what is the value of x
➷ 12x - 8 = 24
Add 8 to both sides:
12x = 32
Divide both sides by 12 to isolate x:
x = 8/3
✽➶ Hope This Helps You!
➶ Good Luck (:
➶ Have A Great Day ^-^
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Answer: x= 8/3
Step-by-step explanation:
first thing u do is add 8 to the 24 because the operation in front is - , that equals 32
since 12 is multiplied by x you divide 12 by 32 to get x by itself and that equals 8/3
Hope this helps mark me brainliest
A water trough has two congruent isosceles trapezoids as ends and two congruent rectangles as sides. The exterior surface area of the trough is ________. The volume of the trough is _____. If a trough is emptied until the water level is even with the midsegment of the trapezoidal ends there will be ______ cubic feet of water left in the trough.
Answer:
Part a) The exterior surface area is equal to [tex]160\ ft^{2}[/tex]
Part b) The volume is equal to [tex]240\ ft^{3}[/tex]
Part c) The volume water left in the trough will be [tex]84\ ft^{3}[/tex]
Step-by-step explanation:
Part a) we know that
The exterior surface area is equal to the area of both trapezoids plus the area of both rectangles
so
Find the area of two rectangles
[tex]A=2[12*5]=120\ ft^{2}[/tex]
Find the area of two trapezoids
[tex]A=2[\frac{1}{2}(8+2)h][/tex]
Applying Pythagoras theorem calculate the height h
[tex]h^{2}=5^{2}-3^{2}\\h^{2}=16\\h=4\ ft[/tex]
substitute the value of h to find the area
[tex]A=2[\frac{1}{2}(8+2)(4)]=40\ ft^{2}[/tex]
The exterior surface area is equal to
[tex]120\ ft^{2}+40\ ft^{2}=160\ ft^{2}[/tex]
Part b) Find the volume
we know that
The volume is equal to
[tex]V=BL[/tex]
where
B is the area of the trapezoidal face
L is the length of the trough
we have
[tex]B=20\ ft^{2}\\ L=12\ ft[/tex]
substitute
[tex]V=20(12)=240\ ft^{3}[/tex]
Part c)
step 1
Calculate the area of the trapezoid for h=2 ft (the half)
the length of the midsegment of the trapezoid is (8+2)/2=5 ft
[tex]A=\frac{1}{2}(5+2)(2)=7\ ft^{2}[/tex]
step 2
Find the volume
The volume is equal to
[tex]V=BL[/tex]
where
B is the area of the trapezoidal face
L is the length of the trough
we have
[tex]B=7\ ft^{2}\\ L=12\ ft[/tex]
substitute
[tex]V=7(12)=84\ ft^{3}[/tex]
7x-3/8=6x-5/8 what is x
7x - 3/8 = 6x -5/8
Subtract 6x from each side:
x - 3/8 = -5/8
Add 3/8 to each side:
x = -5/8 + 3/8
x = -2/8
x = -1/4
write the equation of the line that is parallelto the graph of y=2/3x+7 and passes through the point (-1 -2)
Answer:
y+2 = 2/3(x+1)
y= 2/3x - 4/3
Step-by-step explanation:
If we want a line parallel to y=2/3x+7, it will have the same slope
m = 2/3
We have a point (-1,-2), so we can use point slope form
y-y1 = m(x-x1)
y--2 = 2/3(x--1)
y+2 = 2/3(x+1)
If we want the line in slope intercept form, distribute the slope
y+2 = 2/3 x +2/3
Subtract 2 from each side
y+2-2=2/3x +2/3-2
y = 2/3x +2/3 - 6/3
y= 2/3x - 4/3
please help me answer this question.
Answer:
π/64
Step-by-step explanation:
assuming that c= circumference, and the circumference being 2πr(radius), then r=1/8 because 2π/8=π/4. to find the area, we use the formula πr^2, or π*1/8^2, or π/64
Is this the right answer
Answer:
V = 60
Step-by-step explanation:
Yes, it is
Best regards
Answer:
yes that is that is that is the right answer hope u get all your homework right
Step-by-step explanation:
Solve the following equation by identifying all of its roots including any imaginary numbers and multiple roots.
(x2 - 1)(x2 + 2)(x + 3)(x - 4)(x + 1) = 0
Answer: x = {-1, 1, -i√2, i√2, -3, 4}
Step-by-step explanation:
(x² - 1)(x² + 2)(x + 3)(x - 4)(x+1)=0
Set each factor equal to zero and solve.
x² - 1 = 0 → x² = 1 → x = ±1
x² + 2 = 0 → x² = -2 → x = ± i√2
x + 3 = 0 → x = -3
x - 4 = 0 → x = 4
x + 1 = 0 → x = -1 (note that -1 is a duplicate - solved from the first factor)
Answer:
Answer: x = {-1, 1, -i√2, i√2, -3, 4}
Step-by-step explanation:
What is the value of x in the equation 5(3x + 4) = 23?
[tex]\huge\text{$x=\boxed{\frac{1}{5}}$}[/tex]
Hey there! To solve this problem, we need to isolate [tex]x[/tex] on one side of the equation.
[tex]\begin{aligned}5(3x+4)&=23\\5\cdot3x+5\cdot4&=23&&\smash{\Big|}&&\text{Distribute the $5$.}\\15x+20&=23&&\smash{\Big|}&&\text{Multiply.}\\15x&=3&&\smash{\Big|}&&\text{Subtract $20$ from both sides.}\\x&=\frac{3}{15}&&\smash{\Big|}&&\text{Divide both sides by $15$.}\\x&=\boxed{\frac{1}{5}}&&\smash{\Big|}&&\text{Divide the numerator and denominator by $3$.}\end{aligned}[/tex]
Answer:
[tex] x = \frac { 1 } { 5 } [/tex]
Step-by-step explanation:
We are given the following equation and we are to find the value of x by making it the subject of the equation:
[tex] 5 ( 3 x + 4 ) = 23 [/tex]
We will start by opening the brackets and expanding the term by multiplying 5 with the terms inside the brackets to get:
[tex] 15 x + 20 = 23 [/tex]
[tex] 15 x = 23 - 20 [/tex]
[tex] 15 x = 3 [/tex]
[tex] x = \frac { 3 } { 15 } [/tex]
[tex] x = \frac { 1 } { 5 } [/tex]
Find the exponential function that passes through the points (1, 3) and (2, 9). A) y = 12x B) y = 9x C) y = 6x D) y = 3x
Answer:
D
Step-by-step explanation:
An exponential function which crosses through (1,3) and (2,9) will have a base of 3 since the y values are multiples of 3.
3^1 = 3
3^2 = 9
This means that the function is y = 3^x.
A car drove for 50 seconds in that time it traveled 100 meters. What’s the speed of the car?
Answer:
2m/s
2 meters per second
Step-by-step explanation:
Formula for speed is distance (meters) over time (seconds) after you divide you get 2. Please give me the brainliest answer?
:) Hoped this helped!!! Have a good day!!! <3
Answer:
2 Meters per second
Step-by-step explanation:
289.1 is 70% of what amount
70% × 413 =
(70 ÷ 100) × 413 =
(70 × 413) ÷ 100 =
28,910 ÷ 100 =
289.1
Proof
289.1 ÷ 413 =
0.7 =
0.7 × 100/100 =
0.7 × 100% =
(0.7 × 100)% =
70%
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Analyze the diagram below and complete the instructions that follow. Find the surface area of the rectangular prism. Round your answer to the nearest hundredth. A. 157.89 cm^2 B. 306.95 cm^2 C. 346.16 cm^2 D. 347.45 cm^2
Answer: OPTION D
Step-by-step explanation:
To solve this problem you must apply the formula for calculate the surface area of the rectangular prism:
[tex]SA=2(wh+lw+lh)[/tex]
Where w is the width, h is the heigh and l is the lenght.
Based on the rectangular prism shown, you have that:
[tex]w=9.08cm\\h=3.23cm\\l=11.73cm[/tex]
Finally when you substitute values into the formula you obtain the following result:
[tex]SA=2[(9.08cm*3.23cm)+(11.73cm*9.08cm)+(11.73cm*3.23cm)]=347.45cm^2[/tex]
Answer:
D
Step-by-step explanation:
The surface area is the area of all the surfaces, together.
A rectangular prism has 6 rectangular surfaces. We need to add those 6 faces and sum it.
There are 2 faces with length 3.23 and width 9.08. So,Area = 2 ( 3.23 * 9.08 ) = 58.6568
There are 2 faces with length 11.73 and width 3.23. So,Area = 2 ( 3.23 * 11.73 ) = 75.7758
There are 2 faces with length 11.73 and width 9.08. So,Area = 2 ( 11.73 * 9.08 ) = 213.0168
Summing all of them up,
Surface area of Rectangular Prism = 58.6568 + 75.7758 + 213.0168
=347.4494
* Rounding to nearest hundredth, 347.45 cm ^2
*15 points
A squirrel jumps straight up with an initial vertical velocity of 16 feet per second. How many times does the squirrel reach a height of 4 feet? Explain your answer.
Final answer:
The squirrel reaches a height of 4 feet twice during its trajectory: once on the way up and once on the way down due to symmetrical motion.
Explanation:
The squirrel will reach a height of 4 feet twice during its trajectory. To understand why, let's analyze the motion. The squirrel's vertical motion can be described by the equation [tex]\( h(t) = h_0 + v_0t - \frac{1}{2}gt^2 \),[/tex] where [tex]\( h(t) \)[/tex] is the height at time[tex]\( t \), \( h_0 \) is the initial height, \( v_0 \) is the initial velocity, and \( g \) is the acceleration due[/tex] to gravity.
Given that[tex]\( h_0 = 0 \), \( v_0 = 16 \) ft/s, and \( g = 32 \) ft/s^2,[/tex] we can plug in these values to find the times at which the squirrel reaches a height of 4 feet. Solving the equation[tex]\( h(t) = 4 \) for \( t \),[/tex] we get two solutions:[tex]\( t = 1 \) second and \( t = 3 \)[/tex] seconds. This means the squirrel reaches a height of 4 feet once on its way up and once on its way down. So, the squirrel reaches a height of 4 feet twice.
What is the value of 6X plus 7Y -5 when X = 2 and Y =3?
the answer is 28
have a good day!
Ms. Franklin earns $ 15 an hour. For this year, she will be paid for 40 hours each week for 52 weeks. How much should Ms. Franklin expect to earn this year?
Answer:
About $31,200
Step-by-step explanation:
Miwa borrows $1250 for 1 year. At the end of the year, she pays $112.50 in interest. Find the rate of interest she was charged.
Answer: 10%
Step-by-step explanation: The formula to calculate simple interest is Interest = Principal x Rate x Time
With the number in the formula, 112.50 = 1,250 x r x 1
Simplify:
112.50 = 1,250r
Divide both sides by 1,250:
.1 = r
Therefore, the rate is 10%
PLEASE HELP! I'll mark first comment as brainliest!
The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct missing length to the nearest hundredth. A calculator may be helpful.
a = 18, b = 26, c = ?
A. C=31.78
B. C=31.16
C. C=31.62
D. C=31.46
HELP ASAP!!!! showing work is optional :)
Answer:
The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct missing length to the nearest hundredth. A calculator may be helpful.
a = 18, b = 26, c = ?
A. C=31.78
B. C=31.16
C. C=31.62
D. C=31.46
Step-by-step explanation:
[tex]\sqrt{18^{2}+26^{2} }[/tex]