Is the set of real numbers closed under addition?

All of the following are equivalent fractions except ... ? A. 5/20 B. 8/40 C. 3/15 D. 6/30

Given that f (x) = x2 + 4x, evaluate f (-2).

What is the written form of 30.55

To warm up, Coach Hadley had his swim team swim nine 50-meter long laps. It took the team 5 minutes to finish the warm up. How fast did the team swim in centimeters per second?

Neal is saving $4.25 a week for 100 weeks. How much will he have saved altogether?

Which of the following tables represents a function? A. x) 6 6 7 7 y) 2 - 2 3 - 3 B. x) 2 - 2 3 - 3 y) 5 5 7 7 C. x) 3 - 3 3 - 3 y) 6 7 8 9 D. x) 4 4 5 5 y) 1 2 3 4

Kayla is 2 times as old as gabriella. 12 years ago, kayla was 6 times as old as gabriella how old is gabriella now i need step by step so i know how and get full credit

Dan must do homework for 1/2 of an hour and clean his room for 1/3 of an hour before he can play. What faction of an hour must Dan do homework and clean before he can play

Solve for x. 34+x=12 Enter your simplified answer in the box.

An expression is shown below: 3pf^2 - 21p^2f + 6pf - 42p^2 Part A: Rewrite the expression so the GCF is factored completely. Part B: Rewrite the expression completely factored. Show the steps of your work.