Answer:
y = 90
Step-by-step explanation:
You can use proportions to answer this question.

Cross multiply 30 to -9; -3 to y

Isolate <em>y</em> by dividing -3 on both sides

Answer:
she used 3 on each
Step-by-step explanation:
255/85=3
The value is -3.2. Hope it helps!
Answer:
x= 90/4*2x
Step-by-step explanation: