ERGENT PLS HELP Harvey is solving an equation. His work is shown below.
50 + (50 + 9) = 57
(5x + 50) + 9 = 57
100 + 9 = 57
Which statement describes the procedure Harvey used in his work and which property justifies the procedure?
O A.
Harvey regrouped the terms to add 5x and 5x and 9. This procedure is justified by the commutative property.
O B.
Harvey regrouped the terms to multiply 5x and 5x by 9. This procedure is justified by the associative property.
O C.
Harvey regrouped the terms to add 5x and 5x. This procedure is justified by the associative property.
Harvey regrouped the terms to multiply 5x and 5x. This procedure is justified by the commutative property.
OD
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region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true

( - 4 , -7 )

all the lines must parallel  

step-by-step explanation:

coordinates of c = ( - 1 , 2 )

3 units left = ( -4 , 2 )

9 units down = ( - 4 , 11 )

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)