4.67 miles
I think this is the answer
Answer:
![\frac{7\sqrt{6}}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B7%5Csqrt%7B6%7D%7D%7B2%7D)
Step-by-step explanation:
To rationalize the denominator, all you have to do is multiply the top and bottom by √6:
![\frac{21}{\sqrt{6}}\cdot\frac{\sqrt{6}}{\sqrt{6}} = \frac{21\sqrt{6}}{6}](https://tex.z-dn.net/?f=%5Cfrac%7B21%7D%7B%5Csqrt%7B6%7D%7D%5Ccdot%5Cfrac%7B%5Csqrt%7B6%7D%7D%7B%5Csqrt%7B6%7D%7D%20%3D%20%5Cfrac%7B21%5Csqrt%7B6%7D%7D%7B6%7D)
You can further simplify by dividing the top and bottom by 3:
![\frac{7\sqrt{6}}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B7%5Csqrt%7B6%7D%7D%7B2%7D)
I hope this helped.
188
141 divided by 3 is 47 so 47 times 4 is 188
In the x quarts of 2% fat milk, there is 0.02x quarts of fat.
in the y quarts of 4% fat milk there is 0.04y quarts of fat.
together, there is (x+y) quarts of milk, and 0.24 quarts of fat.
the equations are:
x+y=9
0.02x+0.04y=0.24
multiply the first equation with 0.02: 0.02x+0.02y=0.18
subtract this new equation from equaition 2 to eliminate x:
0.04y-0.02y=0.24-0.18
0.02y=0.06
y=3
x=9-3=6
x is twice as much as y.
He used twice as much as the 2% fat milk than the 4% fat milk.
so the first choice is the correct answer.