exam Maths Puzzle Numerical Ability

3x^2 + 2x^2 - 7

I think the answer is -2x^2

I am trying to Siplifying expressions

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exam Other Question

Write an equation of the line containing the given point and parallel to the given line. Express your answer in the form of y=mx+b.

(5,6);x+8y=5

The equation of the line is y= _____
Solve for x:
sinx=cos2x

show work please!
i need by tonight!
thanks so much if you answer!