The access code for a cars security system consists of four digits. The first digit cannot be zero and the last digit must be odd. How many different codes are available

4500

Step-by-step explanation:

The first digit cannot be 0; therefore, we have 9 choices (1-9, inclusive).

The second and third digits can both be whatever they like, so we have 10 choices for both (0-9, inclusive).

The fourth digit has to be odd, so we have 5 choices (1, 3, 5, 7, 9).

So!

9 * 10 * 10 * 5 = 4500 :))

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!