1.the temperature was 80∘f and then fell 20∘f. 2.the temperature was -13∘f and then rose 9∘f. 3.the temperature was -5∘f and then fell 8∘f.

The initial temperature is 80 °F.

The final termperature is 20°F.

During this period, fell 60 °F which represents a percentage of

We repeat the process for the rest.

From -13 °F to 9 °F, the temperature arose 22 °F, which is equivalent to

From -5 °F to 8 °F, the temperature fell 13 °F, which is equivalent to

ad = ae + ed = y + 7

similar triangles therefor

ac/ab = ad/ae

6/4 = (y + 7) / y

cross multiply

6y = 4(y + 7)

6y = 4y + 28

2y = 28

y = 14

step-by-step explanation:

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8