B) write down the reciprocal of 7.

1/7

Step-by-step explanation:

The product of reciprocals is 1.

The reciprocal of a number is 1 divided by the number.

If the number if a fraction, just flip it. If the number is not a fraction, write it as a fraction by writing it as a fraction over 1, then flip it.

Examples:

The reciprocal of 5 is 1/5. Write 5 as 5/1. Flip it to 1/5.

The reciprocal of 11 is 1/11. Write 11 as 11/1. Flip it to 1/11.

The reciprocal of 4/5 is 5/4.

The reciprocal of 1/15 is 15/1 which is simply 15.

Your problem:

The reciprocal is 7 is 1/7.

-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