Thalia, a quiz show contest, answer 20 questions. She was awarded two points for every correct answer that she gave, but she was penalized one point for every incorrect answer. In the end, Thalia had a total of 28 points. In order to determine the number of correct and incorrect answers that she gave, a view were at home use the system of linear equations X plus Y equals 20 and 2X plus Y equals 28, with ex being the number of correct answers and why being the number of incorrect answers. The view were solve the system by using the linear combination method as shown.

hreryryrranswer:

step-by-step explanation:

there is nothing below so i cannot

step-by-step explanation:

where is abdul's work? don't see that anywhere posted : /

step-by-step explanation:

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!