Marie had 20 Christmas balls to decorate her Christmas tree. During
weekends she buys additional Christmas
balls (r). Express her total Christmas balls
in algebraic expression.
A. 20r
B. 20 + r
C. 20 - r
D. r - 20

The answer is b since she buys some then buys some more so addition

Hope This Helps!!!

The plate is rotated 90° about the origin in the counterclockwise direction. in the image trapezoid, what are the coordinates of the endpoints of the side congruent to side gh?

i saw the grid.

point e (-4,8)
point f (-7,5)
point g (-4,3)
point h (-2,5)

to get the new coordinate of each point for a 90° clock-wise rotation,
(x,y) becomes (-y,x)

point g (-4,3) becomes (-3,-4)
point h (-2,5) becomes (-5,-2)

select one:
a. (-8, -4) and (-5, -2)
b. (4, -8) and (2, -5)
c. (-3, -4) and (-5, -2)   correct answer
d. (4, -3) and (2, -5)