3(s+100)/4 solve for s

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

Find the missing dimension! need asap! tiny square is a =3025 in ²

Factor the polynomial. b^2 + 4b + 4