Homework Answers
suppose that p be the number of pennies and n be the
number of nickels. As you have $8.80 in total (since pennies are
worth $0.01 and nickels are worth $0.05)
0.01p + 0.05n = 8.80 .......1st equation
we also know that there are twice as many nickels than
pennies (or alternatively, there are 2 nickels for every
penny).
n = 2p ...........2nd equation
You can substitute this value of n into the first
equation
0.01p + 0.05n = 8.80
0.01p + 0.05(2p) = 8.80
0.01p + 0.10p = 8.80 (multiplying out the brackets)
0.11p = 8.80 (collecting the p's)
p = 80
Putting this back into the second equation
n = 2p
n = 2(80) = 160
So there are 160 nickels and 80 pennies. ....answer
You can put this back into the first equation to check
it.
0.01p + 0.05n = 8.80
0.01(80) + 0.05(160) = 0.80 + 8 =8.80...checked
Add Answer to:
i need help putting this problem into two equations and then
using substitution.
3.Calvin has $8.80...
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Hello, I need help deriving these 3 equations:
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the magnetic field around the current-running wire? Using
, I and A as variables.
2) How do I get the magnetic flux of B(net) inside the loop with
N turns? I need this equation with the sign included. Using
, N, I, x, r as variables
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IMPORTANT: I don't need help with "a". However, I do need help
with b&c
IMPORTANT: I understand that there's a walkthrough given bellow.
However, I do not understand the walkthrough given for b&c.
Part B
- Why does E(x)+E(y)=2u (2 mew)?
-What is this?: I honestly have no idea what it
is. Please explain to me what it is and what its significance is
within the problem.
-This may be the same thing as the symbol above, but just in...
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solving steps using the addition method and state your final answer
in a sentence. be sure to check your solution.
$10,800 is divided into two investments, one earning 8% simple
interest and the other earning 5% simple interest. After one year,
they earn a combined interest of $795. How much was invested in
each account?
I have also attached an example chart that also needs to be
made as...
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