5x^2-(3xy-7x^2)+(5xy-12x^2) when x=-0.25, and y=4

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.