we know that Bob can do the whole job in 14 hours, how much of the work has he done in 1 hour only? well since he can do the whole lot in 14 hours in 1 hour he has only done 1/14 th of the job.
we know that James can do it in 18 hours, a bit slower, so in 1 hour he has done only 1/18 th of the job.
let's say it takes both of them working together say "t" hours, so in 1 hour Bob has done (1/14) of the work whilst James has done (1/18) of the work, the whole work being t/t or 1 whole, so for just one hour that'd 1/t done by both Bob and James.
![\bf \stackrel{Bob}{\cfrac{1}{14}}~~+~~\stackrel{James}{\cfrac{1}{18}}~~=~~\stackrel{total~for~1~hour}{\cfrac{1}{t}} \\\\\\ \stackrel{\textit{using an LCD of 126}}{\cfrac{9+7}{126}=\cfrac{1}{t}}\implies \cfrac{16}{126}=\cfrac{1}{t}\implies 16t=126\implies t=\cfrac{126}{16} \\\\\\ \stackrel{\textit{7 hrs, 52 minutes and 30 seconds}}{t=\cfrac{63}{8}\implies t=7\frac{7}{8}}\implies \stackrel{\textit{rounded up}}{t=7.88}](https://tex.z-dn.net/?f=%5Cbf%20%5Cstackrel%7BBob%7D%7B%5Ccfrac%7B1%7D%7B14%7D%7D~~%2B~~%5Cstackrel%7BJames%7D%7B%5Ccfrac%7B1%7D%7B18%7D%7D~~%3D~~%5Cstackrel%7Btotal~for~1~hour%7D%7B%5Ccfrac%7B1%7D%7Bt%7D%7D%20%5C%5C%5C%5C%5C%5C%20%5Cstackrel%7B%5Ctextit%7Busing%20an%20LCD%20of%20126%7D%7D%7B%5Ccfrac%7B9%2B7%7D%7B126%7D%3D%5Ccfrac%7B1%7D%7Bt%7D%7D%5Cimplies%20%5Ccfrac%7B16%7D%7B126%7D%3D%5Ccfrac%7B1%7D%7Bt%7D%5Cimplies%2016t%3D126%5Cimplies%20t%3D%5Ccfrac%7B126%7D%7B16%7D%20%5C%5C%5C%5C%5C%5C%20%5Cstackrel%7B%5Ctextit%7B7%20hrs%2C%2052%20minutes%20and%2030%20seconds%7D%7D%7Bt%3D%5Ccfrac%7B63%7D%7B8%7D%5Cimplies%20t%3D7%5Cfrac%7B7%7D%7B8%7D%7D%5Cimplies%20%5Cstackrel%7B%5Ctextit%7Brounded%20up%7D%7D%7Bt%3D7.88%7D)
Answer:
$8,500
Step-by-step explanation:
Interest = 5000 x 5 x 0.14
= 1000 x 0.14 x 25
= 140 x 25
= 3500
5000 + 3500 = 8500
Answer:
1. Y
2. N
3. N
4. N
Step-by-step explanation:
Let's use the second equation, since it seems to be easier to use.
To check if an ordered pair is a solution, plug it in to the equation.
1.
--> Y
2.
--> N
3.
--> N
4.
--> N
Edit : The 4th equation doesn't work for the first equation, whereas the first one still does.
Answer:
2 üssü 12 demek 2'yi 12 defa yanyana yazmak demektir yani 2×2×2×2×2×2×2×2×2×2×2×2×=4096 eder.
şimdi diğerini yapalım aynı şekilde yapmış olursak 25×25 =625 eder
ŞİMDİ SONUCU BULALIM:4096×625=2,560,000
KOLAY GELSİN