2. Pearl solved a system of equations using substitution. Did she
do it correctly? How do you know? If she did not find her error and
solve the system correctly.
2x + (-5 - x) = 20
r-5= 20
X-5 + 5 = 20 + 5
x= 25
System:
y=-5-X
2x + y = 20
Pearl's Solution:
r = 25
y = -30

i dont know

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!

are you missing something?

can i have brainliest? i need it : d