Asprinter started his race slowly and then increase his speed by 12.5 miles per hour to reach a top speed of 21 miles per hour what was the sprinters speed before he increased his speed

first one is a: renaming a fraction. second one is c: de-c

step-by-step explanation:

my explanation is that these were the answers on edg : )

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.