Answer:
D
Step-by-step explanation:
Amy spent 1/6 of the 90 dollars on school supplies, which means to multiply 1/6 by 90
1/6*90
6 and 90 are both factors of 3, so cancel
1/2*30
30/2
$15
Answer is D
PS. you can put the fraction 15/90 and see that it is equal to 1/6 if you're not sure/ if you want to double check :)
