exam Maths Puzzle Numerical Ability

Solve the system by graphing

x-y=5
x+y=3

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exam Other Question

Not algebra but I am really stuck, please help

Q1. which of the points A(-1,2) B(2,13) C (0,3) lie on the line with the equation y=5x + 3? What is the gradient of the line?

Q2.
2a gh
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fg 4 If I am given 43 minutes to complete a task at work, and I complete it in 43 minutes I would have performed the task at 100%. Now if I am able to complete the task at 145% how many minutes would it have taken me to complete the assignment?