Fran solved the equation 42 = x + 23. although her final answer was correct, she could have found it in a simpler way. which sentence best explains why?

She could have just done 42-23 = x and solved the equation in one step because if 23 and x add up to 42, then subtracting one from 42 will result in the other. This means both equations are equivalent, but 42-23 is faster and simpler.

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734