21.6 miles per gallon
Multiplied by 6.2 gallons
21.6 * 6.2 = 133.92
Cheryl can travel 133.92 (or about 134) miles on 6.2 gal. of gas.
Hope that helped!
We evaluate b^2 - 4ac. If the answer is positive, then there are two real solutions. If it is zero, there is one real solution. If it is negative, there are 2 complex solutions. In this equation, a = 1, b = 5, c = 7. Now we plug in the numbers.

Because this answer is positive, there are two real solutions.
The three remaining slices would form 108 degrees.
Hope this helped (and that I was right) =P
Answer:

Apply the formula for sum of cubes: 
Therefore:


= 8xy - x -2xy + 3x
= 6xy + 2x ..............combine like terms
answer
3. 6xy + 2x