How is using partial products to find the product of 22 digit factors similar to how do you use partial products in the past? How is it different explain

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)