How can you solve it if you don't know the equations? :P Just kidding...
n+d=22, so we can say that d=22-n
5n+10d=120, and using d found above in this equation gives you:
5n+10(22-n)=120
5n+220-10n=120
-5n=-100
n=20, and since d=22-n, d=2
So there are two dimes and twenty nickels...
check...
20(5)+2(10)=100+20=120 cents which is $1.20
n+d=22, 20+2=22, 22=22
Answer:
The answer is "A regular hexagon inscribed in a circle" I also took the practice exam and got it right.
Oops I keep on commenting the answers instead of adding it in as an answer lol.
Answer:
a)7
b)x=6
Step-by-step explanation:
The solution to the problem is as follows:
Average cost is c(x)/x.
c(35) = 400 + 20(35) - 0.2(35)^2 = $855.
Then, the average cost is $855/35 = $24.43/radio
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