1. George want to score at least a 90% on his math tests this quarter. So far his test scores are 88, 97 and 80. What does George need to score on his last test to average at least 90%?
Define variable:
Equation:
Solution:

check my work please! it’s number 1 :)

Yes you are correct.

Step-by-step explanation:

The best way to check theese types of questions is go back in plug in X with your answer so 88+97+80+90(which is x)=360 then divide by 4 and get 90! So yes you are correct good job!

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

its a, i had the same answer, its from study island right

step-by-step explanation: