Help please this is a final exam

3x +89 + 8x + 58 =180 (they are supplementary angles, so added together they are equal to 180)

11x + 147= 180 (combine like terms on the left side of the = sign)

11x= 33 (subtract 147 from both sides and then divide by 11 to isolate x)

x= 3  (this is x)

3x +89 (this is the measure of angle MON, plug in x and solve)

3(3)+89

9+89

98 degrees (this is your answer)

Step-by-step explanation:

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

it would be:

c.parallelogram.