Solve using substitution.

4x - 8y = 8

x - y = 4

lunar satellite is orbiting approximately 900 kilometers above the surface of the moon. The satellite can only see about 69.2 arc degrees of the moon is visible to the camera of the satellite. Determine m∠S.

A tree that is 3 feet tall is growing at a rate of 2 feet each year. A tree that is 13 feet tall is growing at a rate of 1 foot each year. Enter the number of years it will take the two trees to reach the same height.

Zack has $500 in a savings account at the beginning of the summer. He wants to have at least $200 in the account by the end of the summer. He withdraws $25 each week for food, clothes, and movie tickets.

Amodel is made of a car. The car is 9 feet long and the model is 6 inches long. What is the ratio of the length of the actual car to the length of the model?

A construction company loads bricks weighing 12 pounds each on a pallet weighing 6 pounds. Which expression gives the weight of a pallet containing n bricks? A. 12 + (n + 6) B. 12 (n + 6) C. 12n + 6 D. 18n

Suppose you have an empty jar with a mass of 196.0 g. After filling the jar with jelly beans the mass of the jar + jelly beans is 323.8 g. If the average mass of a Jelly bean is 1.23 grams, estimate how many Jelly beans were added to the jar.

Can anyone simplify? - (2z + 3w - 5t) + 6 (4z - 8w + 2t)

What is the range of the function f (x) = 1/2sin (2x-pi)

Which of the following functions has an inverse that is not a function? y = x y = 2x + 1 y = x²

Which of the following is a factor of 3x3 + 18x2 + 27x? 9x x3 x + 3 x - 3