Find the value of x (6x+7)(8x-17)

and are both vertical angles; so, the value of x is 12.

Let the angles be A and B; such that:

By theorem of vertical angles

So, we have:

Collect like terms

Divide both sides by 2

Hence, the value of x is 12.

Read more about vertical angles at:

link

12

Step-by-step explanation:

Since the two angles are vertical angles, they are congruent and therefore 6x+7=8x-17

2x=24

x=12

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r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option