exam Maths Puzzle Numerical Ability

a plumber charged $110 for a three hour job and $160 for a five hour job. At this rate, how much would he charge for an eight hour job.

need help. have tried. my answer was $200. please correct me if i am wrong

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exam Other Question

1.find the slope of each line that has a slope
A)the x-axis
B)y=-4

2.find an eq. in slope -intercept form where possible
C)x-intercept-2, y-intercept4
D)thru (-1,4), paralle The larger of two numbers exceeds twice the smaller by 17. If the larger number is divided by the smaller number, the quotient is 3 and the remainder is 7. Find the two numbers