exam Maths Puzzle Numerical Ability

find the x-intercept(s) and he coordinates of the vertex for the parabola
y=x^2-4x-12.

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exam Other Question

How do I set up and solve this word problem?
There are 5 times as many 1$ bills as 5$ bills. The entire number of bills is 48. How many 1$ bills are there? For each situation, find the value of x and the measure of the indicated angles
angle PXR appears to be 55 degrees
angle RXT appears to be 125 degrees
M(anglesign)PXR=3x,m(angle