exam Maths Puzzle Numerical Ability

Solve each of the following by graphing
x+2y=4
x-y=1

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exam Other Question

Please help me, i need to know how to solve this for a test tommorow!

What are the zeros of f(x)=-3(x-2)^2 + 5
find the intercepts and then use them to graph the equation.

y= -3-3x