Answer:
60
Step-by-step explanation:
Divide the number of questions answered correctly by his percentage
51 / 85 = 0.6
Now multiply that answer by 100 to see how many questions are on the quiz
0.6 x 100 = 60
Check your work by dividing that number by the number he answered correctly
51 / 60 = 0.85
the answer is 7 because 7 *7 is 49
8
10^2=100 6^2=36 100-36=64 sqrt64=8
it could be a formula ex- l times w = area
