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stira [4]
3 years ago
12

Rob's first four test scores are 80, 85, 100 and 85. What does he have to score on the last test in order to have a test average

of 90?
Mathematics
1 answer:
faust18 [17]3 years ago
6 0

Answer:

100

Step-by-step explanation:

85 +80+100+85+x(the unknown),/the number of numbers ie 5

350+x/5=90

350+x=90 * 5

350+x=450

x=450-350

x=100

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3 years ago
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Which set of values could be the sides lengths of a 30-60-90 triangle
Maslowich
Hello,

Let's assume a the hypotenuse

b/a=sin 30°==>b=a/2

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3 years ago
Find BC<br>AC = 7<br>BD = 7.5<br>DE = 1.5<br>AE = 11​
tatuchka [14]

5

CE=AE-AC=4

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3 0
4 years ago
The equation 9 y minus 6 x = 36 is written in standard form. What is the first step when writing an equivalent equation which so
enot [183]

Answer:

D. Subtract 9y from both sides of the equation.

Step-by-step explanation:

A. Divide both sides of the equation by 36.

B. Multiply both sides of the equation by 6.

C. Add 9y to both sides of the equation.

D. Subtract 9y from both sides of the equation.

Given:

9y - 6x = 36

To solve for x

Step 1: subtract 9y from both sides

9y - 6x - 9y = 36 - 9y

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Step 2: Divide both sides by -6

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3 years ago
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gavmur [86]

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Step-by-step explanation:

i will answer

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