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Assoli18 [71]
2 years ago
14

Tennis balls must have a high rebound, or bounce, that is approved by the International Tennis Federation. Rebound is measured b

y dropping a ball from a height of 100 inches and measuring how high it bounces. Approved balls must bounce back up 53 to 58 inches. A tennis coach tested 50 tennis balls and found that the mean bounce was 56.2 inches and the standard deviation was 1.8 inches The z-score of a ball that bounces 56.2 inches is This ball has a bounce that is the mean.​
Mathematics
2 answers:
Oliga [24]2 years ago
7 0

Answer:

0.0 and equals to :)

Step-by-step explanation: just got it right on edg

MatroZZZ [7]2 years ago
3 0

Answer:

The person above is right, and deserves brainliest.

0.0

equal to

ED2021

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Even though the elimination method is easy I still have trouble with it
kicyunya [14]

Answer:

(1,2)

Step-by-step explanation:

x+4y = 9

2x -4y= -6

Add the equations together

x+4y = 9

2x -4y= -6

-------------------

3x +0y = 3

3x=3

Divide by 3

3x/3 = 3/3

x=1

Now find y

x+4y = 9

1 +4y =9

Subtract 1 from each side

4y = 8

Divide by 4

4y/4 = 8/4

y =2

6 0
3 years ago
The price of a video game at Game Word has increased from $36 to $45 each. What was the percent change?
andriy [413]

Step-by-step explanation:

price difference= $45-$36

=$9

now,

x% of $45=$9

or, x/100 ×45 =9

or, x/20 ×9=9

or, x/20=1

therefore, x= 20%

3 0
2 years ago
Tom determines the system of equations below has two solutions, one of which is located at the vertex of the parabola.
Rus_ich [418]

Answer:

b must equal 7 and a second solution to the system must be located at (2, 5).

Step-by-step explanation:

Rearranging the first equation:

y = (x - 3)^2 + 4

From this we see that the vertex is at the point (3,4).

So one solution of equation 2 is (3 ,4).

Substituting in equation 2:

4 = -3 + b

b = 7.

So equation 2 is y = - x + 7.

Now we check if  (2, 5) is on this line:

5 = -2 + 7 = 5 , therefore  (2, 5) is on this line.

Verifying if (2, 5)  is also on y = (x - 3)^2 + 4:

5 = (2 - 3)^2 + 4 =  1 + 4 = 5

- so it is. and a second solution to the system is (2, 5).

5 0
2 years ago
Find the equation of a line that is parallel to the line x=-18 and contains the point (-2,1).
VikaD [51]
\left[x \right] = \left[ -18\right][x]=[−18]equation of a line that is parallel
4 0
3 years ago
What value is equivalent to 4 + 3(10 − 2 3)? 3 means the third power.
katrin [286]

Answer: 10

Step-by-step explanation:

4+ 3x (10 - 2^3)

4+ 3x (10 - 8)

4+ 3x 2

4 +6 = 10

5 0
3 years ago
Read 2 more answers
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