Let R₁ = {(a, b) E P2: a divides b) and R₂ = {(a, b) E P²: a is a multiple of b) where P is the set of positive integer numbers. Find a) R₁ UR₂ b) R₁NR₂ c) R₁ R₂ d) R₂\R₁

Let A= -4 1 -3 3 8 0 5 a) A-BT and B= = b) -3B12 +2 A32 c) B₁* A*2 -2 3 -1 -1 4] -2 10 7 · Calculate the following:

What is the value of x? * 23 16 A) 37.7 C) 6.8 B) 31.2 D) 42.7

I al 联系。 (c) (d) that Write down 505 as a sum of two squares. Write down 197 as the sum of four squares. Find all positive primitive Pythagorean triples (x, y, z), with y even, such x+y+z= 30.

Suppose FW = Ax+B, with F6)-r and F() - 8, pind F) interms of A,B,r,s