Group of people are taking the train home 19 people get off the train, 17 people then get on. now there are 63 people on the train. how many were there to begin with?

Evaluate the expression a + b when = 3 and = -5

48 kilometers for every 3 liters!

Which of the following expressions is equivalent to (3x+6) (2x-1)

Lf k (x) = 5x - 6, which expression is equivalent to (k + k) (4) ?

What is the domain of (f/g) (x) if f (x) = x g (x) = 1

Choose an American household at random and let the random variable X be the number of cars (including SUVs and light trucks) they own. Given is the probability distribution if we ignore the few households that own more than 5 cars.

Consider the quadratic equation. x^2=4x-5. How many solutions does the equation have? a.) one real solution b.) two real solutions c.) no real solutions d.) cannot be determined

What is the circumference of the circle of a diameter of 12

1/8 gram of copper and 1/3 of silicone is used to manufacture 30 headphones. how much silicone is used in each pair of headphones?

Luke earned $54 after mowing 3 lawns. Find the constant of proportionality, and then write an equation comparing earnings to lawns mowed. How much would Luke earn after mowing 7 lawns?