Melanie spent four hours babysitting. She charges $16 upfront and then an additional charge per hour. The total
amount she earned can be represented by the expression
$4x + $16. What expression represents the amount she earns
each hour?

If 90° < θ < 180° and cotθ = -1/3, then cscθ =

Recall the definition of a polynomial expression. find two polynomial expressions whose quotient, when simplified, is. use that division problem to determine whether polynomials are closed under division. then describe how theother three operations-addition, subtraction, and multiplication-are different from division of polynomials.

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.