A plumber charges $50 to visit a house plus $40 for every hour of work. Define a variable and write an expression to represent the cost of hiring a plumber.

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)

Don’t know sorry about that