Divide 48 in the ratio 3 : 6:7​

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?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Which ratios are equivalent to 10: 16? check all that apply. 30 to 48 25: 35 8: 32 5 to 15