A teacher is researching the effect of what type of font she uses on a test and the scores on the test to see if there is a
relationship. She randomly gives half her classes tests with Times New Roman font and half her classes tests with Comic
Sans font and then tracks their test scores for a semester. Which is this an example of?
-experiment
-simple random sample
-observational study
-convenience study

Answer:

Step-by-step explanation:

It’s exactly like saying -7 + 3.. -7 is the bigger number so you take away from that the answer is -4

Answer:

-4

Step-by-step explanation:

Remove Parentheses

3-7

Subtract

3-7 = -4

Answer

-4

Hope this helped

Brainliest is appreciated/

1,1 and -1,0 would be the answer

(-2, -1/3)   and   (1,  1 1/3) the coordinates of the points at which the rest stops should be built.

What is coordinates point?

A pair of numbers that describe the position of a point on a coordinate plane by using the horizontal and vertical distances from the two reference axes.

According to the question,

In given figure,

x   from  -3   to  +3    

1/3   would be  -2    

2/3 would be   +1

y   from  -2  to  +3        

1/3  would be   -2 + 5/3 = -1/3      

2/3 would be  -2 + 10/3 = 1 1/3

The two coordinates

(-2, -1/3)   and   (1,  1 1/3)  

Hence ,  (-2, -1/3)   and  (1,  1 1/3)  the coordinates of the points at which the rest stops should be built.

To learn more about coordinate from here

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Answer:

x=(c/a+b)

Step-by-step explanation:

..........

Answer:

x = [tex]\frac{c}{a+b}[/tex]

Step-by-step explanation:

Given

ax + bx = c ← factor out x from each term on the left side

x(a + b) = c ← divide both sides by (a + b)

x = [tex]\frac{c}{a+b}[/tex]

Answer:

21 yards

Step-by-step explanation:

12 pillows x 1.75 yards= 21

21 yards of  fabric would be needed to make 12 pillows

Answer:

Im pretty sure its supposed to be 21 yards

Step-by-step explanation:

1 pillow is 1.75

12 pillows is 12×1.75=21

so she’ll need 21 yards of fabric for 12 pillows

Parallel lines have slopes which are equal to each other.

We know that y = 3x + 2 has a slope of 3, therefore, the line parallel to y = 3x + 2 has a slope of 3.

Answer:

24

Step-by-step explanation:

Average = total number of coins / number of students

If the mean number of coins with boys is 14, the total number of coins held by boys =  14 x 9 = 126

The total number of coins held by the students = total number of children x average number of coins held by the children

15 x 18 = 270

The total number of coins held by girls = 270 - 126 =144

The mean  number of coins for the girls = 144 / 6 = 24

Answer:

(x+3)(x-3)  *  2  

4 (x-3)          (x+3)

= 1/2

Answer:

1/2

Step-by-step explanation:

[tex]\frac{(x-3) * (x+3) }{2(2x-6)}[/tex] × [tex]\frac{2}{x+3}[/tex]

[tex]\frac{(x-3)*1}{2(x-3)}[/tex]

[tex]\frac{1}{2}[/tex]

Answer:

I don’t have the answer but I recommend downloading socratic I use this app and it is so helpful

Step-by-step explanation:

It helps me with all my questions

Answer:the first one is x=87

The second one is x =8

Step-by-step explanation

Answer:

71.500

Step-by-step explanation:

502 is closer to 500 than 600.

Answer:

71.50

Step-by-step explanation:

This is because 2 is not up to 5, so it can't be turned into 1 and be added to 0.

Answer:

answer is +$7.56

Step-by-step explanation:

I guess I was help full for u

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Answer:

10 = 5x

5/10

x =1/2

unit rate is equal to 0.50

Step-by-step explanation:

Answer:

( 6,-1)

Step-by-step explanation:

Point B is at ( 0,3)

We are going down 4 units so subtract 4 from y

and going right 6 units so add 6 to x

(0+6 , 3-4)

( 6,-1) is the location of B'

Answer:

B- its going 4 down from positive 3 which will make it -1 and 6 over from 0 which makes it 6 and that gives you the answer of (-1,6)

Answer:

$12.5

Step-by-step explanation:

Since prize is split equally.

So, money received by each person

= 75/6

= $12.5

Answer:

1-Rectangular prism

2-cube

Step-by-step explanation:

Rectangular prism - Multiply the measurement of the length times the width, then times the height.

Cube - Since all sides are the same measurement, it would be the measurement of any side, or edge, cubed, or a³

Answer:

26

Step-by-step explanation:

ab+c

plug in #s

4(6)+2

start to solve

24+2

26

Answer:

4

Step-by-step explanation:

The answer is 4 because if m = 2 then 2 + 2 = 4

Answer:

9

Step-by-step explanation:

Add the numbers together and then divide by how many numbers there are.

Answer:

you need to show it

Step-by-step explanation:

Answer:

Undefined

Step-by-step explanation:

Answer:

Frank can park 8.9 hours at the highest

Step-by-step explanation:

Here, we want to know the greatest amount of time that Frank can park given the amount he has to spend on parking.

From the question, we are told that he pays $2 for the hour and an extra $1 per additional hour.

Now, let the number of additional hour he is going to park be x. The bill for the additional hours will be ; $1 * x = $x

By adding this to the initial $2, we have the total $9.90

So, mathematically;

2 + x = 9.90

x = 9.9 -2

x = 7.9 hours

Now, the initial hour he parked is 1 hour + number of incremental hours = 1 + 7.9 = 8.9 hours

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{360}}}}}[/tex]

Step-by-step explanation:

Steps for finding L.C.M of the given numbers :

[tex] \star[/tex] First of all find the prime factors of each numbers.

[tex] \star[/tex] Take out the common prime factors.

[tex] \star[/tex] Also take out the remaining prime factors.

[tex] \star[/tex] Multiply those all prime factors and obtain L.C.M. If there is not any common prime factors then their L.C.M is the product of the given numbers.

Now,let's find the least common multiple ( L.C.M ) of 45 and 120 following those steps :

prime factors of 45 = 3 × 3 × 5

prime factors of 120 = 2 × 2 × 2 × 3 × 5

Common prime factors= 3 and 5

Remaining prime factors = 2 , 2 , 2 and 3

Multiply all the prime factors to obtain L.C.M

[tex] \dashrightarrow{ \sf{3 \times 5 \times 3 \times 2 \times 2 \times 2}}[/tex]

[tex] \dashrightarrow{ \boxed{ \sf{360}}}[/tex]

Hope I helped!

Best regards! :D

The number of miles per year that he has rowed since he was given the machine will be Roughly 2000. Then the correct option is D.

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.

A 63-year-old man has rowed around the world in his living room, according to a newspaper story. On a rowing machine that he received for his 50th birthday, he logged 24084 miles.

The number of miles per year is calculated as,

⇒ 24,084 / (63 - 50)

⇒ 24,084 / 13

⇒  1852.61 ≈ 2,000

The number of miles per year that he has rowed since he was given the machine will be Roughly 2000. Then the correct option is D.

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Answer:

4x = -4

Step-by-step explanation:

4x = -12+8

4x = -4

x = -1

Step-by-step explanation:

4x - 8 = -12

4x = 8 - 12

4x = -4

x = (-4)/4

x = -1

[tex]12^{12}[/tex]

subtract 4 from 16.

Answer:

x=3

Step-by-step explanation:

Step 1: Add two to 7 and inverse the minus 2

3x=7+2 3x=9

Step 2: Divide each number by 3.

3x/3=x and 9/3=3

so x=3

Answer:

61& 7/20

Step-by-step explanation:

Answer:

x=3

Step-by-step explanation:

Answer:

Step-by-step explanation:

|x+6|=|x-12|

x+6=±(x-12)

when x+6=x-12

6=-12

which is impossible hence rejected.

x+6=-(x-12)

x+6=-x+12

x+x=12-6

2x=6

x=6/2=3

so x=3

Answer:

umm there is no answer u have to make a diagram of the rational and irratinal or the area of numbers its not a letter u have to make a diagram

Step-by-step explanation:

Answer:

Step-by-step explanation:

3(2y-7)=

Distribute

3 * 2y - 3 *7

6y - 21

Step-by-step explanation:

3(2y-7) = 6y-21

y = 21/6

y = 3