PLEASE EXPLAIN HOW YOU GOT YOUR ANSWER.

2.5 + 2.5 + 2.5 + 1.25 = 8.75  

Step-by-step explanation:

Mental math is doing calculations mentally. It uses numbers that are easy to work with in your head.

They wanted to calculate 35 % of 25.

They reasoned that

35 % = 10 % + 10 % + 10 % + 5 %

(and 5 % is half of 10 %)

So they took 10 % of 25 =2.5, added it together three times, and then added half of 10 % = ½ × 2.5 = 1.25

They got

2.5 + 2.5 + 2.5 + 1.25 = 7.5 + 1.25 = 8.75

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.

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.