Solve the systems of equations by substituting y=-5 5x+4y=-20

You can buy 2 dvds for the same price you would pay for 3 cds selling for $13.20 apiece. how you could find the prive of 1 dvd.

Simplify the following 2a + 3b + 4a - 7b

Find the volume of a cylinder of height 32cm and base radius is 14cm

Simplify the expression 1.4 - 5.5 - 1.73+1.8-1.09

How are the ratios 24 laps: 1 h and 192 laps:8 h different?

Find the first five term of the sequence whose nth term is given by the fallowing-4n-3

Write a problem that involves changing kilograms to grams. explain how to find the solution.

Tony is having a cookout and has to spend. He wants hamburgers that are $6 a box and hotdogs that are $2 a package. If he buys 2 boxes of burgers, how many packages of hotdogs can he buy?

What are the numbers that have an absolute value of 2 and 1 half

Find volume of length=6 width=5 height=5