Answer: 
Step-by-step explanation:
For this exercise it is important to remember:
- The Distributive property:
- The multiplication of signs:
Then, given the following expression:
You need to apply the Distributive property. Then:
Now you can combine like terms (or add the like terms). Then you get:
Therefore, the equivalent expression created by combining like terms, is:
Your max amount for this is $20. Let's say x represents the number of gallons.
20 ≥ 3.2x
x = 6.25 gallons
If they're asking for integers or whole numbers, you'd round down to 6 because you only have enough money for 6 full gallons. If you rounded up to 7, you wouldn't be able to fill it up completely because then you'd be over your $20.00 budget for gas.
Answer: x - 5
Step-by-step explanation:
Since, the area of the rectangle = 
Length of the rectangle = x+5
Let the width of the rectangle = b
Thus, the area of the rectangle = 
⇒ 
⇒ 
⇒ 
Therefore, the expression that shows the width of the rectangle = x-5
The x-intercept of a function is basically it's roots. So when you factor out the function f(x) = x^2 - 16x + 64 you get
(x-8)(x-8)
x = 8
So x-int. is (0,8) or x = 8
i would suggest memorizing this
hence
