Math
look at this system of equations. how can the system be changed so that the two equations have equal x-coefficients?
3x + 2y = 12
6x + 3y = 21
a. divide both sides of the top equation by 2
b. multiply both sides of the top equation by 2
c. divide both sides of the top equation by 3
d. multiply both sides of the top equation by

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Find two numbers if their sum is 91 and the ratio is 6: 7?

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p. mc) knowing that it is going to rain tomorrow, and going to bed before 9 p. md) knowing that you have a test in school tomorrow, and studying thw night before