exam Maths Puzzle Numerical Ability

we did a thickness (layers) and a breaking weight (pennies) and they want us to describe the relationship between thickness and breaking weight. I will show you my pattern: thickne

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exam Other Question

a plumber charged $110 for three-hour job and $160 for a five-hour job. At this rate, how much would he charge for an eight-hour job? Solve each of the following systems of linear inequalities graphically.3x-y<or=6
x>or=1
y<or=3