Ineed asap
i’m so stumped on this one mainly cause i’m not as intelligent

The answer is D. 12

To find this you would add (5x+16) and (9x-4) and set them equal to 180, because angles on a straight line add up to 180:

5x+16+9x-4 = 180

Then you would solve that for x, and would get x=12

Hope this helps!

what's the question?

step-by-step explanation:

there is no question.

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116