A. You would just get a lot of names back from people, thinking they have the most time playing instruments.
B. This question is not a statistically accurate question if you would like statistical answers back.
Statistical question definition:
A statistical question is one that can be answered by collecting data and where there will be variability in that data. For example, there will likely be variability in the data collected to answer the question,
The question to ask to get statistical answers back would be: How many hours do you play the instrument a day?
Each student would answer and you would see who has the most hours.
Final answer:
Minnie should collect quantitative data on the hours spent playing instruments by her classmates to determine who spends the most time. The original survey question is not statistical because it does not allow for analysis of a group trend, but changing the question to inquire about the typical number of hours spent by students each week would make it statistical.
Explanation:
Part A: Expected Data Collection
The data Minnie would expect to collect from her survey question would consist of quantitative information. Specifically, she should gather the number of hours each classmate spends playing musical instruments per week. This data allows her to determine which student spends the most time practicing.
Part B: Statistical Question Analysis
The question, "Which student spends the most time playing musical instruments?" is not a statistical question because it seeks a singular answer rather than understanding a trend, variation, or distribution within a group. To make it statistical, the question could be modified to: "How many hours do students typically spend playing musical instruments each week?" This revised question allows for the collection, analysis, and interpretation of data, which can lead to conclusions about the musical habits of Minnie's classmates.
The Eagle Club wants to build a chain of 2,505 dominoes. If they have already set up 807 dominoes, how many more do they need to add to meet their goal?
Answer:
1698
Step-by-step explanation:
Answer:
They would need 1698 dominoes to complete the chain.
Step-by-step explanation:
all you would do is subtract 2,505 by 807 and you would get the same answer.
Which of the following equations will produce the graph shown below?
Answer:
The answer is the first one.
Step-by-step explanation:
What helped me figure this out was going to desmos.com which is a great site for graphing. If you put in the equations this should help you find the answer. I hope this helps love! :)
Answer: A. [tex]\dfrac{x^2}{100}+\dfrac{y^2}{64}=1[/tex]
Step-by-step explanation:
The equation of ellipse centered at origin is when the horizontal major axis (2a) and verticel minor axis (2b) is the major axis :-
[tex]\dfrac{x^2}{a^2}+\dfrac{y^2}{b^2}=1[/tex]
From the given picture , [tex]a=10[/tex]
[tex]b=8[/tex]
Now, the equation of the given ellipse :-
[tex]\dfrac{x^2}{(10)^2}+\dfrac{y^2}{(8)^2}=1\\\\\Rightarrow\ \dfrac{x^2}{100}+\dfrac{y^2}{64}=1[/tex]
please!!!!! ANSWERR!! HURRY ILL MARK YOU AS BRAINNN
Answer:
A=280in^2
Step-by-step explanation:
3*3=9
A=2LW+2WH+2LH
A=2(8*4)+2(4*9)+2(8*9)
A=2(32)+2(36)+2(72)
A=64+72+144
A=280in^2
Pls help. Ignore the orange around one of the choices.
The temperature started at -12 degrees then increases by 8 degrees. This means that you can make an expression to solve this like so...
-12 + 8
When adding a positive number with a negative number you will act as if you are subtracting the two numbers, then take the sign of the largest number. In this case the largest number is 12 and its sign is negative. Your answer will have a negative sign.
Act as if you are subtracting...
12 - 8 = 4
Take the sign of the largest number (12)
-4 (third option)<<<This is the temperature now.
Hope this helped!
~Just a girl in love with Shawn Mendes
Answer:
-4F
Step-by-step explanation:
We start at -12
We rise 8
-12 +8
-4
We will then be at -4
will 5x-3y>15 have a solid line
Answer:
The inequality [tex]5x-3y >15[/tex] have a dashed line
Step-by-step explanation:
we have
[tex]5x-3y >15[/tex]
The solution of this inequality is the shaded area below the dashed line
The equation of the dashed line is [tex]5x-3y=15[/tex]
The slope of the dashed line is positive
The y-intercept of the dashed line is -5 ---> point (0,-5)
The x-intercept of the dashed line is x=3 ----> point (3,0)
Graph the solution
see the attached figure
Which word best describes the range of a function? input output independent relation
Answer:
Output
Step-by-step explanation:
A function takes values of x (the horizontal axis on a plane)and returns the corresponding values of y (the vertical axis on a plane).
Thus, the values we get for y depends on the value of x.
The x's values that we give in a function are called the domain, and the values that the function returns to us are called the range of the function (the y's).
So a word that describes the range of a function well is that the range is the output of the function. Because the range is the set of values that the function returns to us when we plug an x value.
Rewrite without parentheses and simplify.
(6w+7)
Answer:
6w + 7
Step-by-step explanation:
There is nothing to simplify. Just remove the parentheses.
the perimeter of a triangle below is 6a + 2b -5 units. write expression to represent the length in units , of the missing side of the triangle
2a-3b
a-3
As are know sides.
If f(x) = -5% - 4 and g(x) = -3x - 2, find (f+ g)(x).
Need help !
Answer:
[tex]\large\boxed{(f+g)(x)=-8x-6}[/tex]
Step-by-step explanation:
[tex](f+g)(x)=f(x)+g(x)\\\\f(x)=-5x-4,\ g(x)=-3x-2\\\\\text{Substitute:}\\\\(f+g)(x)=(-5x-4)+(-3x-2)\\\\=-5x-4-3x-2\qquad\text{combine like terms}\\\\=(-5x-3x)+(-4-2)\\\\=-8x-6[/tex]
x + y = k
2x + 3y = k + 1
The point of intersection of the lines has an x-coordinate of
A.2k + 1
B.-2k + 1
C.2k - 1
Answer: Yes A is correct
Step-by-step explanation:
Multiply the first equation by 3...
2x+3y=k+1 needs to be subtracted by 3x+3y=3k
which equals -x=-2k-1
Then you can multiply the equation by -1 to make them all positive. Resulting in x=2k+1
The correct option is c.
To solve the given simultaneous linear equations x + y = k and 2x + 3y = k + 1 using the elimination method, multiply the equations by suitable constants to eliminate one variable. The values of x and y in terms of k are x = 2k - 1 and y = 1 - k.
Explanation:To solve the given simultaneous linear equations x + y = k and 2x + 3y = k + 1 using the elimination method, we can eliminate one variable by multiplying the equations by suitable constants. Let's multiply the first equation by 2 and the second equation by -1 to eliminate x.
2x + 2y = 2k
-2x - 3y = -k - 1
Adding these equations together, we get:
2y - 3y = 2k - (k + 1)
-y = k - 1
Multiplying both sides by -1:
y = 1 - k
Substituting this value of y back into the first equation:
x + (1 - k) = k
x = 2k - 1
So, the values of x and y in terms of k are x = 2k - 1 and y = 1 - k.
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which of the following shows the graphical representation of the solution for the one-variable linear equation 2x-1=3
For this case we have the following equation:
[tex]2x-1 = 3[/tex]
If we add 1 to both sides of the equation we have:
[tex]2x = 3 + 1\\2x = 4[/tex]
Dividing between 2 on both sides of the equation we have:
[tex]x = \frac {4} {2}\\x = 2[/tex]
The graph of the solution is shown in the attached figure.
Answer:
See attached image
The difference between three times a number and seven is twenty. What is the number?
Answer:
9
Step-by-step explanation:
(9*3) = 27 which is 20 more than 7
Answer: 9
Step-by-step explanation:
Write a recursive formula for the sequence -2,4,-8, 16, ...
a = -2, a, = an - 1+6, n22
a = -2, an=-2an - 1, n > 2
19,5-2, a, = 24, -1, 122
aj = 16, an= -2an - 1, n > 2
Answer:
[tex] a_1 = -2;~a_n = -2a_{n - 1}, ~n \ge 2 [/tex]
Step-by-step explanation:
The first number in the sequence, [tex] a_1 [/tex], is -2.
Each number after that is the previous number multiplied by -2.
[tex] a_1 = -2 [/tex]
[tex] a_2 = a_1 \times (-2) = -2 \times (-2) = 4 [/tex]
[tex] a_3 = a_2 \times (-2) = 4 \times (-2) = -8 [/tex]
etc.
[tex] a_n = -2a_{n - 1} [/tex]
We start by stating that [tex] a_1 = -2 [/tex].
Now we need to show that for all n greater than or equal to 2, each number in the sequence is the previous number multiplied by -2.
[tex] a_n = -2a_{n - 1} [/tex]
Answer:
[tex] a_1 = -2;~a_n = -2a_{n - 1}, ~n \ge 2 [/tex]
A recursive formula represents the relationship between each term and the ones before it. In the given geometric sequence (-2, 4, -8, 16,...), each term is -2 times the preceding term, hence the recursive formula is [tex]a_{n} = -2a_{n-1}[/tex] for n>1.
Explanation:The given sequence is -2, 4, -8, 16, ..., which is an example of a geometric sequence. In a geometric sequence, each term after the first is found by multiplying the previous term by a fixed, non-zero number called the 'common ratio'.
Looking at the pattern, we notice that each term is -2 multiplied by the prior term. Therefore, the recursive formula for this sequence is [tex]a_{n} = -2a_{n-1}[/tex] where 'an' represents the nth term and 'an-1' represents the previous term, and n > 1.
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In order to solve for the variable in the equation Mikel first applies the distributive property. Which equation is a result of this step?
Answer:
1 - x - 2 + 2x = 10x - 25 - x
Step-by-step explanation:
We have the expression: 1 - (x+2) + 2x = 5(2x - 5) - x
Applying the distributive property we get:
1 - x - 2 + 2x = 10x - 25 - x
So, the following equation is the result of that step: 1 - x - 2 + 2x = 10x - 25 - x
Answer:
The equation is:
[tex]1-x-2 + 2x = 10x-25-x[/tex]
Step-by-step explanation:
The distributive property says that
[tex]c(a+b) = ac + bc[/tex]
In this case we have the following equation
[tex]1-(x+2) + 2x = 5(2x-5)-x[/tex]
Then apply the distributive property as shown below
[tex]1-1*x-1*2 + 2x = 5*2x-5*5-x[/tex]
Now simplify the expression
[tex]1-x-2 + 2x = 10x-25-x[/tex]
So the equation that results after applying the distributive property is:
[tex]1-x-2 + 2x = 10x-25-x[/tex]
Add -4/y + (-7/8y).
please help
Answer:
-39/8y
Step-by-step explanation:
-4/y(2)+(-7/8y)
What is the length of the hypotenuse of the triangle?
Answer:
8.1 ft
Step-by-step explanation:
hyp² = side² + side²
hyp² = 7² + 4²
hyp² = 49 + 16
hyp² = 65
hyp = sqrt of 65
hyp = 8.1 ft
PLEASE DO MARK ME AS BRAINLIEST UWU
Answer:
[tex]\large\boxed{\sqrt{65}\ ft}[/tex]
Step-by-step explanation:
Use the Pythagorean theorem:
[tex]leg^2+leg^2=hypotenuse^2[/tex]
We have
[tex]leg=4ft,\ leg=7ft,\ hypotenuse=AB[/tex]
Substitute:
[tex]AB^2=4^2+7^2\\\\AB^2=16+49\\\\AB^2=65\to AB=\sqrt{65}[/tex]
Multiply.
(x2 - 5x)(2x + x-3)
Hi there! My name is Zalgo and I am here to help you out today. When you multiply (x2-5x) (2x+x-3), you will get 3x^3-18x^2+15x.
I hope that this info helps! :)
"Stay Brainly and stay proud!" - Zalgo
(By the way, can you mark me Brainliest? I'd greatly appreciate it! Thank you! XP)
what are the approximate solutions of 2x^2+9x=8 to the nearest hundredth
Answer:
x=0.76 or -5.26
Step-by-step explanation:
You can apply the completing square method to solve this ;
[tex]2x^2+9x=8\\\\[/tex]
Rewrite the equation with a zero like below
[tex]2x^2+9x-8=0[/tex]
This is by taking 8 to the left side of the equation
Divide the terms by 2 in x²
[tex]\frac{2x^2}{2} +\frac{9x}{2} -\frac{8}{2} =\frac{0}{2}[/tex]
[tex]=x^2+4.5x-4=0[/tex]
Move the number term to the right side of the equation
[tex]x^2+4.5x=4[/tex]
complete square on the lefts side of the equation, how?
[tex]=(\frac{b^}{2})^2 =(\frac{4.5}{2} )^2=5.0625[/tex]
balance the equation by adding this value to the right side , in this form
[tex]x^2+4.5x+5.0625=4+5.0625\\\\[/tex]
Factorize the left side
[tex](x+2.25)(x+2.25)=9.0625\\\\\\(x+2.25)^2=9.0625\\[/tex]
Eliminate the square on the left side
[tex]x+2.25=\sqrt{9.0625}[/tex]
x+2.25= ± 3.010
Solve for x
x=+3.010-2.25=0.76
or
x=-3.010-2.25=-5.26
Answer:
x = 0.76 or x= -5.26
Step-by-step explanation:
Points to remember
Solution of a quadratic equation ax² + bx + c = 0
x = [-b ± √(b² - 4ac)]/2a
It is given a quadratic equation,
2x² + 9x = 8
⇒ 2x² + 9x - 8 = 0
To find the solution
Here a = 2, b = 9 and c = -8
x = [-b ± √(b² - 4ac)]/2a
= [-9 ± √(9² - 4*2*(-8))]/2*2
= [-9 ± √(81 +64)]/4
= [-9 ± √(145]/4
= [-9 ± 12.04]/4
x = [-9 + 12.04]/4 or x = [-9 - 12.04]/4
x = 0.76 or x= -5.26
Help me I need to pass so I can go on to the next thing plz someone help me
Answer:
The scale factor is 2
Step-by-step explanation:
AB -->A'B' : enlargement , scale factor is greater than 1
From QA to QA' : 1.25 to 2.5 so the ratio is 1:2
The scale factor is 2
What is the value of m in the figure below? If necessary,round your answer to the nearest tenth of a unit
Answer:
D
Step-by-step explanation:
It turns out from similar triangles, that 7/BD = BD / 18. Use triangles ABD and BDC to show this relationship. Solving this equation will give you BD
BD^2 = 7*18
BD^2 = 126 Just leave it in this form. Do your rounding at the end.
Because triangle BDC is a right angle triangle, use the Pythagorean Theorem to solve for m
m^2 = BD^2 + 7^2
m^2 = 126 + 49
m^2 = 175 Take the square root of both sides.
sqrt(m^2) = sqrt(175)
m = 13.22
so the answer is D
Find the quotient. (6x 2 - x - 40) ÷ (5 + 2x) 8 - 3x 3x + 8 3x - 8
Answer:
The quotient is 3x-8
Step-by-step explanation:
(6x^2-x-40)÷ (5 + 2x)
The above equation can be written as
(6x^2-x-40)÷ (2x + 5)
The division is shown in the figure below.
The quotient is 3x-8
Answer:
(6x^2-x-40)÷ (5 + 2x)
The above equation can be written as
(6x^2-x-40)÷ (2x + 5)
The division is shown in the figure below.
The quotient is 3x-8
Step-by-step explanation:
Is abc~def? If so, identify the similarity postulate or theorem that applies.
Answer:
Similarity cannot be determined ⇒ answer D
Step-by-step explanation:
* Lets revise the cases of similarity
1) AAA similarity : two triangles are similar if all three angles in the first
triangle equal the corresponding angle in the second triangle
- Example : In ΔABC and ΔDEF, m∠A = m∠D, m∠B = m∠E and
m∠C= m∠F then ΔABC ≈ ΔDEF by AAA
2) AA similarity : If two angles of one triangle are equal to the
corresponding angles of the other triangle, then the two triangles
are similar.
- Example : In ΔPQR and ΔDEF, m∠P = m∠D, m∠R = m∠F then
ΔPQR ≈ ΔDEF by AA
3) SSS similarity : If the corresponding sides of two triangles are
proportional, then the two triangles are similar.
- Example : In ΔXYZ and ΔLMN, if [tex]\frac{XY}{LM}=\frac{YZ}{MN}=\frac{XZ}{LN}[/tex]
then the two triangles are similar by SSS
4) SAS similarity : In two triangles, if two sets of corresponding sides
are proportional and the included angles are equal then the two
triangles are similar.
- Example : In triangle ABC and DEF, if m∠A = m∠D and [tex]\frac{BA}{ED}=\frac{CA}{FD}[/tex]
then the two triangles are similar by SAS
* Now lets solve the problem
- In the triangles ABC and DEF
∵ m∠B = m∠E = 105°
∵ AB/DE = 16/4 = 4
∵ AC/DF = 36/9 = 4
∴ AB/DE = AC/DF = 4
∴ The two pairs of sides are proportion
∵ ∠B and ∠E are not the including angles between the sides AB , AC
and DE , DF
∵ We could not find the including angles from the information of the
problem
∴ We cannot prove the similarity
* Similarity cannot be determined
Answer:
D- can't be determined
Step-by-step explanation:
a p e x work
2 and 3 are
angles.
complementary
vertical
congruent
supplementary
Answer:
supplementary
Step-by-step explanation:
Angles 2 and 3 form a straight line. Straight lines are supplementary
Answer:
Supplementary
Step-by-step explanation:
1 and 2 are vertical along with 3 and 4 they can't be complementary non of them form right angles but supplementary is a straight line making 180 degrees.
In the game of blackjack played with one deck, a player is initially dealt 2 different cards from the 52 different cards in the deck. A winning "blackjack" hand is won by getting 1 of the 4 aces and 1 of 16 other cards worth 10 points. The two cards can be in any order. Find the probability of being dealt a blackjack hand. What approximate percentage of hands are winning blackjack hands?
Answer:
[tex]P =4.83\%[/tex]
Step-by-step explanation:
First we calculate the number of possible ways to select 2 cards an ace and a card of 10 points.
There are 4 ace in the deck
There are 16 cards of 10 points in the deck
To make this calculation we use the formula of combinations
[tex]nCr=\frac{n!}{r!(n-r)!}[/tex]
Where n is the total number of letters and r are chosen from them
The number of ways to choose 1 As is:
[tex]4C1 = 4[/tex]
The number of ways to choose a 10-point letter is:
[tex]16C1 = 16[/tex]
Therefore, the number of ways to choose an Ace and a 10-point card is:
[tex]4C1 * 16C1 = 4 * 16 = 64[/tex]
Now the number of ways to choose any 2 cards from a deck of 52 cards is:
[tex]52C2 =\frac{52!}{2!(52-2)!}[/tex]
[tex]52C2 = 1326[/tex]
Therefore, the probability of obtaining an "blackjack" is:
[tex]P = \frac{4C1 * 16C1}{52C2}[/tex]
[tex]P = \frac{64}{1326}[/tex]
[tex]P = \frac{32}{663}[/tex]
[tex]P =0.0483[/tex]
[tex]P =4.83\%[/tex]
Answer:
Probability = 0.0483
Percentage = 4.83%
Step-by-step explanation:
We know that a blackjack hand played with one deck consists of:
1 of the 4 aces = [tex]\frac{4}{52}[/tex]
So 1 out of the 16 cards worth 10 points will be equal to = [tex]\frac{16}{52}[/tex]
Finding the probability of getting a blackjack hand assuming that the cards were not replaced:
P (blackjack hand) = P(1st ace) × P(2nd 10 point card) + P(1st 10 point card) × P(2nd ace)
P (blackjack hand) = [tex]\frac{4}{52} \times \frac{16}{51} + \frac{16}{52} \times \frac{4}{51}[/tex] = 0.04827
Percentage of getting blackjack hand = 4.83%
a negative slope means that the line moves up from left to right
No the negative slope means the line moves down from left to right.
Hope this helps.
r3t40
Answer:
It slopes upwards from right to left.
Step-by-step explanation:
A negative slope means that a line rises from right to left. Like a back slash \.
A truck can be rented from company A for $40 a day plus $0.30 per mile. Company B charges $20 a day plus $0.70 per mile to rent the same truck. Find the number of miles in a day at which the rental costs for company A and company B are the same.
Despite different rental costs, the rental costs for company A and company B will be the same, after 50 miles.
To solve this, we need to set up an equation based on their pricing structures and solve for the number of miles.
Let m represent the number of miles driven. The cost for company A would be $40 + $0.30m, and the cost for company B would be $20 + $0.70m.
We set these two expressions equal to each other to find the breakeven point:
$40 + $0.30m = $20 + $0.70m
Subtracting $0.30m from both sides gives us:
$40 = $20 + $0.40m
Next, we subtract $20 from both sides:
$20 = $0.40m
Dividing both sides by $0.40, we get:
m = 50
What is the value of x in the equation 3x -1/9
y = 18, when y = 27?
5
7
45 63
Answer:
[tex]x=7[/tex]
Step-by-step explanation:
we have
[tex]3x-\frac{1}{9}y=18[/tex]
Substitute the value of y=27 in the equation and find the value of x
so
[tex]3x-\frac{1}{9}(27)=18[/tex]
[tex]3x-3=18[/tex]
[tex]3x=18+3[/tex]
[tex]3x=21[/tex]
[tex]x=7[/tex]
Rationalize the denominator and simplify.
3 √6+5 √2/4 √6-3 √2
To rationalize the denominator and simplify the given expression, multiply both the numerator and denominator by the conjugate of the denominator. Simplify the resulting expression by applying the FOIL method and simplifying square roots. The final simplified expression is 72+24 √6+20 √12/84.
Explanation:To rationalize the denominator and simplify √6+5 √2/4 √6-3 √2, we need to eliminate the square root from the denominator. To do this, we can multiply both the numerator and denominator by the conjugate of the denominator, which in this case is 4 √6+3 √2. The conjugate of a binomial in the form a+b is a-b. So, we will multiply the numerator and denominator by 4 √6+3 √2:
(3 √6+5 √2)(4 √6+3 √2)/[(4 √6-3 √2)(4 √6+3 √2)]
Next, we can apply the FOIL method in the numerator and the difference of squares in the denominator to expand the expression:
(3*4*6+3*4*2 + 5*4 √6 √2 + 3* √2 √6)/ (16*6 - 9*2)
Simplifying further, we get:
(72+24 √6+20 √12)/102 - 18
The final simplified expression is:
72+24 √6+20 √12/84
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Which pair of lines is parallel? A. y=4x+1 and y+4=5 B. y=-2+x and 2y-2x=-2 C. y=1/4x + 2 and y-2=1/2x D. y=1/5x+1 and 5y+x= 10
Answer:
B. y=-2+x and 2y-2x=-2
Step-by-step explanation:
Two lines are parallel if they have the same slope.
The equation 0of a line is tipically written as y=mx + b, where 'm' represents the slope and 'b' the y-intercept.
Let's evaluate each of the options:
A. y=4x+1 and y+4x=5
Writing the equations in the slope-intercept form, we get:
y=4x+1 → m=4
y=5-4x → m=-4
Given that they have different slopes, they are not parallel.
B. y=-2+x and 2y-2x=-2
Writing the equations in the slope-intercept form, we get:
y=-2+x → m=1
y=-1 + x → m=1
Given that the equations have the same slope, they are parallel.
C. y=1/4x + 2 and y-2=1/2x
Writing the equations in the slope-intercept form, we get:
y=1/4x + 2 → m=1/4
y=1/2x+2 → m=1/2
Given that they have different slopes, they are not parallel.
D. y=1/5x+1 and 5y+x= 10
Writing the equations in the slope-intercept form, we get:
y=1/5x+1 → m=1/5
5y+x= 10 → y=2 - 1/5x → m=-1/5
Given that they have different slopes, they are not parallel.
Tell whether 4/2 and 14/7 form a proportion
Final answer:
Yes, 4/2 and 14/7 form a proportion because both ratios simplify to 2/1, which indicates they are equal and therefore proportional.
Explanation:
To determine if two ratios, 4/2 and 14/7, form a proportion, we need to compare the simplified forms of each ratio and see if they are equivalent. A proportion exists when two ratios are equal to each other. Simplifying both ratios, we get 4/2 = 2/1 and 14/7 = 2/1. Since both simplified ratios are equal to 2/1, we can conclude that 4/2 and 14/7 indeed form a proportion.