7/8 of an hour is 52.5 minutes. 3/10 of 52.5 minutes is 15.75 minutes. They spent 15.75 minutes warming up and cooling down.
Answer:
The area of the black square is equal to the sum of the areas of the gray squares.
First you do 3.5z-2.7z= .8z then you divide .8 with -6, which gives you -7.5 so z= -7.5
Answer:
400
Step-by-step explanation:
25% is a fourth 100 ×4 is 400
