Find the measure of ∠C if

∠A =
5
2
x + 30
∠B =
7
2
x + 40
∠C =
9
2
x + 10
∠D =
5
2
x + 20

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

One of the complementary angles is 4 degrees mor than the other. find the angles (recall that complementary angles are angles whose sum is 90 degrees.) which of the following can not be used to solve the problem if x represents one of the angles? a. 2x-4=90 b. 2x+4=90 c. x+4=90