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

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Why do interests rates on loans to be lower in a weak economy than in a strong one

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?