Find w if v = 200, w = 10, and h =2 > v=1wh

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5