About 7.99 seconds, the way I figured it out was I did 1022 divided by 16 so that is could be easier to solve, which equals 63.875, when I took the square root of 63.875 I got 7.99.
let's firstly convert the mixed fractions to improper fractions and then add them up, bearing in mind that the LCD from 12 and 6 will just be 12.
![\bf \stackrel{mixed}{14\frac{11}{12}}\implies \cfrac{14\cdot 12+11}{12}\implies \stackrel{improper}{\cfrac{179}{12}}~\hfill \stackrel{mixed}{3\frac{1}{6}}\implies \cfrac{3\cdot 6+1}{6}\stackrel{improper}{\cfrac{19}{6}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{179}{12}+\cfrac{19}{6}\implies \stackrel{\textit{using the LCD of 12}}{\cfrac{(1)179~~+~~(2)19}{12}}\implies \cfrac{179+38}{12}\implies \cfrac{217}{12}\implies 18\frac{1}{12}](https://tex.z-dn.net/?f=%5Cbf%20%5Cstackrel%7Bmixed%7D%7B14%5Cfrac%7B11%7D%7B12%7D%7D%5Cimplies%20%5Ccfrac%7B14%5Ccdot%2012%2B11%7D%7B12%7D%5Cimplies%20%5Cstackrel%7Bimproper%7D%7B%5Ccfrac%7B179%7D%7B12%7D%7D~%5Chfill%20%5Cstackrel%7Bmixed%7D%7B3%5Cfrac%7B1%7D%7B6%7D%7D%5Cimplies%20%5Ccfrac%7B3%5Ccdot%206%2B1%7D%7B6%7D%5Cstackrel%7Bimproper%7D%7B%5Ccfrac%7B19%7D%7B6%7D%7D%20%5C%5C%5C%5C%5B-0.35em%5D%20~%5Cdotfill%5C%5C%5C%5C%20%5Ccfrac%7B179%7D%7B12%7D%2B%5Ccfrac%7B19%7D%7B6%7D%5Cimplies%20%5Cstackrel%7B%5Ctextit%7Busing%20the%20LCD%20of%2012%7D%7D%7B%5Ccfrac%7B%281%29179~~%2B~~%282%2919%7D%7B12%7D%7D%5Cimplies%20%5Ccfrac%7B179%2B38%7D%7B12%7D%5Cimplies%20%5Ccfrac%7B217%7D%7B12%7D%5Cimplies%2018%5Cfrac%7B1%7D%7B12%7D)
Answer:
543.2 miles
Step-by-step explanation:
Input the given value of x into the equation and solve for y:
y = -67.9x + 679
y = -67.9(2) + 679
y = -135.8 + 679
y = 543.2
The total distance in miles after 2 hours is 543.2 miles.
3 x 0.79= $2.37
2 x 1.29= $2.58
4 x 0.15= $0.60
9 x 0.38= $3.42
$2.37 + $2.58 + $0.60 + $3.42= $8.97
$20.00 - $8.97= $11.03
The answer is $11.03