Given : Andre drove 200 Miles using 9 Gallons of Gas
⇒ Andre drives 1 Mile using ![[\frac{9}{200}]\;Gallons\;of\;Gas](https://tex.z-dn.net/?f=%5B%5Cfrac%7B9%7D%7B200%7D%5D%5C%3BGallons%5C%3Bof%5C%3BGas)
⇒ Andre drives (420 × 1 Mile) using ![[\frac{420\times9}{200}]\;Gallons\;of\;Gas](https://tex.z-dn.net/?f=%5B%5Cfrac%7B420%5Ctimes9%7D%7B200%7D%5D%5C%3BGallons%5C%3Bof%5C%3BGas)
⇒ Andre drives 420 Miles using 18.9 Gallons of Gas

I think this is what you want? When multiplying with exponents, you either add or multiply the exponents.
When you multiply the exponent:
(x²)³ = 
= 9
When you add the exponents:
(x²)(x³) = 
(x²)(x²) = 

Answer:
x = 18
A = 110
Step-by-step explanation:
Angles A and B are supplementary angles so they add to 180 degrees
A + B = 180
5x+20 + 9x -92 = 180
Combine like terms
14x -72 = 180
Add 72 to each side
14x-72+72 = 180+72
14x = 252
Divide each side by 14
14x/14 = 252/14
x =18
A = 5x+20
= 5*18 +20
=90 +20
= 110