Leah prefers babysitting over working at the ice cream shop. Out of 20 hours, what is the maximum number of hours she can babysit to be able to earn at least $120 per month?

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)