» Jeffrey learned to sing a total of 10 pieces over the course of 5 weeks of voice lessons.
After 9 weeks of voice lessons, how many pieces will Jeffrey be able to sing, in total? Solve
using unit rates.

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)

The answer would be c