Bob just signed a lease on a rental agreement. The current rent is \$1,580 per month, and he estimates a 5% increase each year. Use his estimate to predict the sum of the next four years worth of monthly rental expenses.​

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)