Obtain an equivalent system by performing the stated elementary operation on the system. Replace the second equation by the sum of itself and 2 times the third equation. A. 6x + 10y + 112 = -18

B. 4x - 4y - 5z = -20

C. 5x- 6y+11z=10

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

h is the x-coordinate of the vertex

step-by-step explanation:

we have

in this function

the point represent the vertex of the function

so

h is the x-coordinate of the vertex

k is the y-coordinate of the vertex

3. 8,935,200 minutes

4. 227,040 feet