The total change in the outside temperature from 6pm to 10pm is represented as -12 degrees Farenheit. if the temperature changes by the same number of degrees each hour, how would you represent the change in temperature each hour?

-3

Step-by-step explanation:

6 pm to 10 pm is 4 hours. If it changes -12 degrees in 4 hours, the it changes (-12/4) -3 each hour.

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!