Answer:
Answer is D hope this helps
Step-by-step explanation:
first speed --- x mph
return speed -- x+16 mph
6/x + 6/(x+16) = 1
times each term by x(x+16)
6(x+16) + 6x = x(x+16)
x^2 + 4x - 96 = 0
(x-8)(x+12) = 0
x = 8 or x is a negative
her first speed was 8 mph
her return speed was 24 mph
check:
6/8 + 6/24 = 1 , that's good!
Right your ratio of
![\frac{8}{12}](https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B12%7D%20)
Simplify fraction to 3/4
Now set it up with c/100 to find the percent (c equaling the percentage of caremel brownies)
Cross multiplty:
![\frac{2}{3} \frac{c}{100}](https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B3%7D%20%5Cfrac%7Bc%7D%7B100%7D%20)
Crossmultiply:
3c = 200
Divide (solve equation)
c = <span>
66.6666666667</span>
Well you have to go $33.95 x 7.25 and that will be your answer. Do it fast!
I believe x = 23/105 because you would have to add 3/35 to both sides and when you add 2/15 to 3/35 you get an answer of 23/105.
Hope this helps!