To calculate the average you add up all the scores and divide by the number of scores (5)
add all the current test scores and allow X to be the unknown score:
92+80+88+93+X: or 353 + X
set up equation:
(353+X)
______ = 90
5
Multiply both side of the equation by 5 to clear the fraction resulting in:
353+X=450
Subtract 353 from both sides of the equation:
x = 97
So the test score needed to get a 90 average is 97.
Answer:
<h2>x = -2.2</h2>
Step-by-step explanation:
Answer:
.........................
12 / 3 = 4
4 x 2 = 8
Answer: She used 8 gallons of paint
1. 72,000
2. 20,000
3. 410,000
4. 26
5. 40
6. 50
7. 320,000 = 160,000 • 2
