Jack's plumbing charges customers $100 per hour for repair jobs. A-1 Plumbing chargers according to the equation y= 75x + 50, where x = time in hours and y = cost in dollars . Explain why A-1 plumbing charges less than jacks plumbing for a 4-hour repair job . Does A-1 plumbing charge less than jacks plumbing for all repairs jobs ?

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11 -1> 1 -1+ a

-12 > a

46

step-by-step explanation:

given

height = 168 cm

formula

height =2.47*f+54.13

solution

168 = 2.47f + 54.13             subtract 54.13 from both sides

168 - 54.13   = 2.47f             combine

113.87 = 2.47f                     divide by 2.47

113.87 / 2.47 = f                   combine

46.1 = f  

answer: 46 cm