Hi!
To find x, you'll need to divide by -6 on both sides of the equation. When -6x s divided, you're left w/ x. When 78 is divided by -6, you'll get -13.
So your answer is x<-13. You'll need to switch the sign because 13 is a negative so the greater than sign is turned into a less than sign. S your answer is D.
I hope this helps!
I think you mean circumference...Area is

. We have the area so we need to use it to solve for the radius which we will then use in the circumference formula.

. Divide both sides by pi to get

. Of course the simplification of the left side gives us

and r = 4. Now fill that in to the circumference formula, which is

, to get C

which is a circumference of
A right triangle :) to find the length of a missing side, you can use the pythagorean theorem (a^2 + b^2 = c^2)
Answer:
∠SQR = 1/2 m ∠SR = 1/2 x 86 = 43°