Determine whether the ratios are equivalent. 7/4 and 14/2

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?

Give the functions f(x) = |x + 2| - 3, what is the domain? a, b,c, or d all real numbers x > 2 x < -2 all real numbers and x cannot equal to 2

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy. how much will she pay after the discount