Please help due today need answer im super bad at this

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /