If f (x) = -x - 7 what is f (-3)
Plz help

Find the value of a. the diagram is not to scale. a quadrilateral is drawn. the upper and lower sides are parallel. the interior angle in the upper left corner is labeled a degrees. the angle in the upper right corner is labeled 113 degrees. the angle in the lower right corner is labeled b degrees. the angle in the lower left corner is labeled 36 degrees. a. 36 b. 144 c. 54 d. 126

Anyone know? will mark brainliest if you're correct!

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76