Need help ASAP please

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

Solve the equation. 2x - 8(x+1)= 6(2x - 3)

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?