exam Maths Puzzle Numerical Ability

The vertices of a triangle are P(-1,-1) , Q(2,1), R(3,-1). Find the equation of the altitude of triangle PQR drawn from Q.

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exam Other Question

Given y=3x^2+6x

Please explain the process in steps. Thanks!

A.) find the y-intercept
B.) find the x-intercepts (if any)
c.) find the vertex
D.) Sketch the parabola. Find three consecutive odd integers such that the sum of the first and third integers is twice the second integer.