In an experiment, the control variable is a and the response variable is b. Which variable is manipulated, or changed

What is the value of 4[-9.4]

3x+2y=17 4x-2y=-4 Linear equations

The mass of bacteria in a labaratory experiment increases exponentially by 22% each hour. The mass of bacteria was 8 micrograms when the experiment began.

What ratio is equivalent to 4 : 28

A passenger plane travels at about 7.62 x 10^2 feet per second. The plane takes 1.23 x 10^4 seconds to reach its destination. About how far must a plane travel to reach its destination? Write your answer in scientific notation.

How many square inches off gift wrap will be need to cover a box that is 4inx6inx2in

Robert says the expression 2+3 times 7 and 2 + (3 times 7) have the same value. Is Robert correct? Explain your answer and evaluate each expression

There are 209 7th graders this year. This is a 5% decrease from last year. How many 7th graders were there last year?

Is 0.213211321113 rational or irrational

Joe spends $8 for lunch and $6.50 for dry cleaning. He also buys 2 shirts that cost the same amount. Joe spends a total of $52. What is the cost of each shirt?