When asked to factor the trinomial 7x^2+7x-14 a student gives the answer (x + 2)(x – 1). what is one thing wrong with this answer?

a. there is nothing wrong with the answer
b. the plus sign should be a minus sign
c. the factors are not simplified
d. 7 is also a factor of this trinomial

D would be correct here

Step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

a

step-by-step explanation: