What is the value of x in the solution to the system of equations below?

15x-12y=13

30x+9y=4

a. - 17/3

b. 1/3

c. - 2/3

d 1/6

According to the laws of physics, should bees be able to fly? The Bee Movie says they shouldn't, but yet they can. Can someone explain?

If William has 5 different shirts and 7 different pairs of pants, how many different combinations could he wear?

Serenity has some pennies and some nickels. She has no less than 18 coins worth at most $0.66 combined. If Serenity has 12 pennies, determine the maximum number of nickels that she could have.

What two numbers add up to 1 and multiply to get - 12

What's the difference between a independent variable and dependent variable

If the mean of the following distribution is 91 and sum of frequencies is 150 find x and y

Find the value of the spring constant for the spring in trial i. use 0.367 s for the value of the period. the mass of the suspended block is 0.400 kg. enter your answer in n/m with three significant figures.

5 + 3x = - 1 + 6 (6x + 1)

If you see a triangle that has a small box in one angle, what type of triangle is it?

There are t teams in a soccer league. each team consists of 11 players. write an equation to find how many players p are in the league