The red cross is holding blood drives in two locations. in one day, center 1 collected 715 pints and center 2 collected 1035 pints. write and evaluate an expression to estimate the total number of pints of blood donated over a 3-day period.

5,250 pints of blood

Step-by-step explanation:

The Red Cross is holding blood drives in two locations.

In one day, Center 1 collected blood = 715 pints

and Center 2 collected blood = 1035 pints

Let the number of pints donated over a 3-day period be x.

so the expression will be

x/3 = 715+1035 (since the number of pints of blood donated in one day is the sum of pints collected in both the centers in one day )

x = 3( 715 + 1035 )

= 3 × 1,750

= 5,250 pints of blood

Total 5,250 pints of blood donated over a 3 days period.

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.