A cement mason starts making concrete by making 2.5 pounds of sand to 3.25 pounds of gravel. The mason uses 414 pounds of sand and gravel to start the concrete. How many pounds of gravel does the mason use?

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