One cooy machine can run off copies in 198 minutes. A newer machine can do the same job in 126 minutes. How long does it take the two machines, working together, to make all of the necessary copies?

What is - 15 divided by (-3) ?

Make x the subject of the formula ax + 2c = bx + 3d

Vincent has been collecting 13 rocks per week. He gives 7 rocks away to a friend. If w represents the number of weeks that Vincent has been collecting rocks, which expression represents the number of rocks Vincent has left?

What is 0.4 (5+2x) - 0.5=3 (0.3x+0.7) I've solved this but I'm not sure I got the right answer

Clare used linear combination to solve the equations shown. She did so by multiplying the second equation by a certain number to eliminate the x-terms. What number did Clare multiply the second equation by? {x - y = 5 {0.5x + 0.1y = 8.5

Which problem would you use the following proportion to solve for? = what is 40% of 24? what percent is 24 of 40? twenty-four is 40% of what number? forty percent of 24 is what number?

5th garade math prob 4.6:7=

A loan company charged 35 percent interest on every dollar borrowed. If a peson borrowed 177 dollars, how much would they end up paying total?

3a+4+b+2a+5+b Simplified the expression

Christian can paint a car in 6 hours. Carter can paint the same car in 3 hours. If they work together, how long will it take to paint the car?