Pls help! will give brainlist!

Greg put a diagonal support across the back of a bookcase, as shown. What is the length, X, to the nearest 10th of a foot, of the diagonal support on the bookcase.

A. 4 feet
B. 8 feet
C. 6.5 feet
D. 5.8 feet

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60