Noemi wrote this expression to describe the number of homework problems she has left to do. 30 – h which situation could be described by this expression? a. noemi knows she has 30 homework problems. she does not know how many she has completed. b. noemi knows she has completed 30 homework problems. she does not know how many she has left. c. noemi knows she has completed 30 homework problems. she doesn't know how many she was assigned. d. noemi knows she has 30 homework problems. she knows she has twice as many left.

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3