Which is th equivalent to (9y^2-4x) (9y^2+4x)

Diamond used a number line to add. She started counting at 10, and then she counted until she was on the number - 4 on the number line. If Diamond is modeling addition, what number did she add to 10?

Suppose that a large mixing tank initially holds 500 gallons of water in which 50 pounds of salt have been dissolved.

Can u show 4 divided 4 with a rectangle

Sandra needs to obtain a random sample of 20 students from her school, in order to do a project for her statistics class. Which method would be BEST for doing this? A) Choose 20 students who are in sports programs.

An oceanographer is recording the depths, in meters below sea level, where he finds various specimens of sea slugs. The depths are 20, 13, 14, 25, 29, and 16. What is the range of depths where the sea slugs were found?

X = a) 50 b) 100 c) 25

How do you subtract a positive fraction from a negative fraction?

Simplify: 4.16-1.1*2.6+0.7 squared

If a typist can type 350 words in 7mins, how many words can she type in 1Min

Which symbol can be placed in the blank of 5.01 5.010