What we know:
I = Invest (so we dont mess up on interest.)
So, I = $7,000
First Account is 4%
Second Account is 2%
End of the year David Earns $476 in interest
With percent's you can always turn them into a decimal.
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The Question: How much was in each account?
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Step by Step Answer:
I = amount invested at 4%
4% = 0.40
8% = 0.80
0.40 - $7,000 = 6999.6
0.80 - 6999.6 = 6998.8
6998.8 - 476
Amount in both accounts in total is 6522.80.
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HOPE THIS HELPS! =3
HAVE A FANTASTIC DAY!
Answer:
- cookie: $1.25
- cupcake: $2.75
Step-by-step explanation:
Let x and y represent the cost of a cookie and a cupcake, respectively.
4x +3y = 13.25
5x +2y = 11.75 . . . . . . the system of equations
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By Cramer's rule:
x = (3(11.75) -2(13.25))/(3(5) -2(4)) = 8.75/7 = 1.25
y = (13.25(5) -11.75(4))/7 = 19.25/7 = 2.75
The cost of one cookie is $1.25; the cost of one cupcake is $2.75.
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Cramer's rule gives the solution to the system of equations ...
ax +by =c
dx +ey = f
as ...
∆ = bd -ea
x = (bf -ec)/∆
y = (cd -fa)/∆
Answer:
I think Leslie Is 20
Step-by-step explanation:
