Which algebraic expression is a trinomial?

x3 + x2 – StartRoot x EndRoot
2x3 – x2
4x3 + x2 – StartFraction 1 Over x EndFraction
x6 – x + StartRoot 6 EndRoot

Find an equation for the linear function which has slope -10 and x-intercept -7

When you answer this can you explain

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up