Solve by means of a combination of substitution and addition elimination

2x-y+3z=-14

4x+2y-z=12

6x-3y+4z=-22

Helen makes $66 a day. How much will she make if she works 5 1/2 days?

A jar of coins contains 6,245 pennies. What is 6,245 rounded to the nearest hundred?

What goes into 55 and 11

Twenty-one fish are swimming in an aquarium. Eleven are removed, leaving 10 fish. Which number is the additive inverse of the number of fish left?

How does the volume of the cylinder compare to the volume of the cone

What are two division expressions that have the same value as 61.12 divided by 3.2

Kenya bought 28 beads and nancy bought 25 beads. It takes 35 beads to make a necklace. Write and solve two addition equations to find how many more beads they each need to make a necklace

How to find the vortex

Assume that the candle manufacturer has 4 types of round candles and 8 types of square candles available, and a gift set consists of 3 round and 3 square candles. How many different gift packages are possible?

Which of the following expressions is equivalent to - 9? A. 63 : 7 B. - 63 : 7 C. - 7 : 63 D. - 63 : (-7)