Answer:
A) The repair bill would be at least $320 after 8 hours
B) The repairman would have worked for 5 hours
Step-by-step explanation:
A) Set up your equation with x equaling hours
30x + 80 = 320
subtract 80 to the opposite side of the equation
30x = 240
divide by 30
30x/30 = 240/30
x = 8
B) Set up your equation with x equaling hours
30x + 80 = 230
subtract 80 to the opposite side of the equation
30x = 150
divide by 30
30x/30 = 150/30
x = 5
I’m not sure about this one but you previous ques was solved
(X+40) (3x-20)
Just multiply them first
3x^2 - 20x + 120x - 800
3x^2 - 100x - 800
Answer: 34
Step-by-step explanation:8874 * 261= 34
79.57 times 12% = 70.02
70.02 times 7.75% = 5.43
70.02 plus 5.43 = 75.43