Question in the picture

The mistake is that 16 was added to the other side of the equal sign instead of subtracted in step 3. Then b^2 should equal 48 and the rest is right.

Step-by-step explanation:

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).