Sarah weighs 30 more than 2 times as sheila. their total weighs is 150 kilograms. what is the weigh of each in grams?

Asquare parking lot has 6,400 square meters what is the length in meters

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Can someone explain to me how to do