Help me please don’t use me for points

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

A+b= 17, ab=70, find the value of |a-b|

Graph the following system of linear inequalities. identify at least two points in the solution: y < 5 - 2x | x + 5y > -7