Answer:
20%
Step-by-step explanation:
percentage increase is calculated as
× 100%
increase = 72 - 60 = 12 and original temperature is 60 , then
percentage increase = × 100% = 0.2 × 100% = 20%
b
distributive property-
-5c-(-20) which is -5c+20 which can also be 20-5c