exam Maths Puzzle Numerical Ability

How would solve this system by graphing?

x + y = 3 x + y = -1

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exam Other Question

In a right triangle, one leg is twice the other leg, and the area is 9. How long is the hypotenuse? I need some help checking this question. Thanks.

Simplify: y(to the power of 60) + y(to the power of 45) / y(to the power of 15)

Answer: y(to the power of 30)(y(to the power