In order to solve the following system of equations by addition, which of the following could you do before adding the equations so that one variable will be eliminated when you add them ? 3x -6y = -15 -2x + 5y = 14 a. multiply the top equation by 2 and the bottom one by 3. b. multiply the top equation by -3 and the bottom one by 2. c. multiply the top equation by 2. d. multiply the bottoms equation by 6.

Pls i’m too dumb to know what i’m doing right now

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?