Explaining step by step the simplest form of the expression 9r(r+3)-2r(r-4)

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Convert (-3,0) to polar form. a. (3,0’) b. (-3,180’) c. (3,180’) d. (3,360’)

What is being done to the variable in the equation 3 + g = -9? the number 3 is being added to it. the number 3 is being subtracted from it. the number -9 is being added to it. the number -9 is being subtracted from it.