Math
posted by Mary .
a) Find the product (1/2x2+y2) xy
b) Simplyfy 5/3a2b x (3/4ab3) x (4/5a2b2) and find the value for 2= 2 and b= 1.
c) Divide x (5x2  80 by 5x (x+4).
Thanks in anticipation.

c) I will do the last one,
I assume you meant:
x(5x^2  80)/(5x(x+4))
= 5x(x^2  16)/(5x(x4))
= (x4)(x+4)/(x4)
= x+4 , x ≠0, 4
without proper bracketing, I cannot make out the others. Use ^ to show exponents