Tan's electricity bill for the month of august was $267.00. his september bill showed a 2% increase from his august bill. in october, his bill deacreased by 8% from the amount he was billed in august. how much did tan spend on electricity over the three-month period?

Start by getting what a 1% depression would be:

267,000 / 100 = 2,670 (this is 1%)

In September, his cost increases 2%:

267,000 + 2 * 2,670 = 272,340

In October, the cost decreased by 8%:

267,000 - 8 * 2,670 = 245640

Add the three months up:

267,000 + 272,340 + 245,640 = $784,980

-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