Write the two-part name for the polynomials for the following expressions: 1.) 7x³ 2.) 7x - 3x³ + 1
3.) r³ - 2r²
4.) 12x² - 5x + 1
5.) t⁵ - 8t
6.) 5a² + 7
7.) 5 - t³ - 7t
8.) 7x
9.) 18
10.) y⁸ + 8

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?