Achunk of gold and copper in the ratio 20: 7. how much gold is in this 200g sample of gold

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]