exam Maths Puzzle Numerical Ability

Find the measure of an angle if its measure is four times the measure of its complement????

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exam Other Question

Mardi recieved an inheritance of $50,000, She invested part at 10% and deposited the remainder in tax-free bonds at 11%. Her total annual income from the investments was $5200. Find the amount invested at 10%. Can you plese help me with the following?

I need to solve and graph the following equation and interpet the result:

2x-3y=6 and 2x+y=-10.