Answer:

Step-by-step explanation:
Midpoint of line segment is calculated as
-----------(1)
Here

Substituting values in equation (1)


90-30=60 Hoped this helped
Step-by-step explanation:
120*10% =12
10% percent *120
= (10/100)*120
= (10*120)/100
= 1200/100 = 12
120 - 12 = 108.00 is original price of math text