While doing the homework, Claire solved 35 excercises in 50 minutes. Find Claire’s rate of work in exercises per minute.

1.428 but rounded to 1.43 minutes per problem?

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)