Solve the literal equation for y=2x + 15

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

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