Terry can run 15 miles in the same amount of time it takes mark to run 21 miles. if mark runs 2mph faster than terry, how fast does mark run?

What is the standard form of -5x^2+2x^4-11+x^3+3x

Which two undefined geometric terms always describe figures with no beginning or end?

If you eat 4 medium strawberries, you get 48% of your daily recommenced amount of vitamin c. what fraction of your daily amount of vitamin c do you still need?