So a 3 foot cable is10.25
a 6foot cable is 15.50
so
x=cost per foot
y=cost of special connectors
3x+y=10.25
6x+y=15.50
make first equation negative and add to the first
3x=5.25
divide both sides by 3
1.75=x
so it costs 1.75 for a foot of cable
subtitue into first equation
3(1.75)+y=10.25
5.25+y=10.25
subtract 5.25 from both sides
y=5 dollars=cost of special so
4x+y=4(1.75)+5=7+5=$12
so the cost of a 4 foot cable is $12
Okapi=o llama=l
o+l=450
3l=190+o
I cant remember how to work it out but if you have a graphics calculator you would open a calculator page, press Menu:3:1 (solve function) and type in those equations. It would look like this:
solve(o+l=450 and 3l=190o,o)
l=160 o=290
llamas are 160kg and okapis are 290kg. Hope that helped a bit :)
9514 1404 393
Answer:
80
Step-by-step explanation:
If N is the total number of coins, then the number of quarters is ...
36 = 0.45×N
36/0.45 = N = 80
You have 80 coins you your collection.
Total = Principal * ((1 + rate/n)^(n*years)
Total = 3,000 * (1.04)^20
Total =
3,000 *<span>
<span>
<span>
2.191123143
</span>
= </span></span>
<span>
<span>
<span>
6,573.37</span></span></span>
So, he will have to add (7,000 - <span>6,573.37) =
$ 426.63
answer is b
Here's a calculator to check your work http://www.1728.org/compint.htm
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