John's father throws John a birthday party that costs $350. He pays $150 for the DJ, $50 for the cake and $3 per party guest for food. How many guest were at the party?

The method to find the female dormitory is 2-d=800

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)