Solve the system by substitution. y=-x^2+2x+10 y=x+4 a. (3,7), (-2,2) b. (-1,3), (2,6) c. (0,4), (4,8) d. (1,5), (5,9)

Option A.

Step-by-step explanation:

System of equations is

-x² + 2x + 10 = y (1)

and y = x + 4 (2)

By substituting the value of y from equation 2 to equation 1

-x² + 2x + 10 = x + 4

-x² + 2x - x + 10 - 4 = 0

-x² + x + 6 = 0

x² - x - 6 = 0

x² - 3x + 2x - 6 = 0

x(x - 3) + 2(x + 3) = 0

(x - 3)(x + 2) = 0

x = 3, -2  

Now in the given options for x = 3, -2, values of y will be = 7, 2

Option A. will be the answer.

your answer is a

step-by-step explanation:

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step-by-step explanation: