What is the value of x for the following system of equations?

15x-12y=13

30x+9y=4

Write a problem that can be modeled by the equation 2x 40=60. then the solve the equation and explain the solution in the context of the problem

You start at (-4, 5). You move down 8 units. Where do you end?

A jar contains 32 marbles, of which 7 are blue, 8 are red, and the rest are green. What is the ratio of blue marbles to red marbles to green marbles?

What percentage of 158 is 144.5?

A jewelry box has a length of 3 1/2 units, a width of 1 1/2 units, and a height of 2 units. What is the volume of the box in cubic units?

Given that f (x) = 5x-10 qnd g (x) = 1/5 x+2 find (f*g) (x)

If 1 Swiss franc equals 6.3367 Chinese yuan, then 1 Chinese yuan equals approximately how many Swiss francs

What is - 119/5 as a mixed number?

A catering service offers 7 appetizers, 12 main courses, and 6 desserts. A banquet chairperson is to select 5 appetizers, 6 main courses, and 4 desserts for a banquet. In how many ways can this be done?

How many pounds in a stone