Write expressions for the perimeter and area of the rectangle. with sides of "12" and "x -2".

First of all, we should know the formula of the are of the rectangle, which is base by height

We should also know the perimeter of a rectangle (and any other figure) is the sum of all its sides, in this case, 4 sides.

Now, we should be able to write the expressions which represent teh area and perimeter of the rectangle as we know the length of each side.

Area: base * height = 12 * (x - 2) = 12x - 24

Perimeter (note each side lenght appears two times, as the rectangles is a regular shape with 4 sides, where the parallel ones have the same lenght):  

2 * 12 + 2 * (x-2) = 24 + 2x - 4 = 20 + 3x

-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

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !