Grady marks down some $2.49 pens to $1.99 for a week and then marks them back up to $2.49.Find the percent of decrease and then the percent of increase to the nearest tenth. Separate your answers with a comma.

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

i would say true? if the unit was informational and it "refreshed your understanding", then true.

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6