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myrzilka [38]
2 years ago
5

PLS HELP WILL MARK YOU BRAINLIEST! NO FAKE ANSWERS!!

Mathematics
2 answers:
loris [4]2 years ago
8 0

11x+3

iam not sure check with another guy but i got this

Mamont248 [21]2 years ago
8 0

\\ \tt\hookrightarrow 7x+4+4x+9=90

\\ \tt\hookrightarrow 11x+13=90

\\ \tt\hookrightarrow 11x=77

\\ \tt\hookrightarrow x=7

  • m<A=7(7)+4=49+4=53
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I literally don't know how to figure this out i haven't done this in ages. Help please
Hitman42 [59]
We begin with an unknown initial investment value, which we will call P. This value is what we are solving for.

The amount in the account on January 1st, 2015 before Carol withdraws $1000 is found by the compound interest formula A = P(1+r/n)^(nt) ; where A is the amount in the account after interest, r is the interest rate, t is time (in years), and n is the number of compounding periods per year.

In this problem, the interest compounds annually, so we can simplify the formula to A = P(1+r)^t. We can plug in our values for r and t. r is equal to .025, because that is equal to 2.5%. t is equal to one, so we can just write A = P(1.025).

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23,517.6 = (1.025P - 1000)(1 + .025)^1
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Divide both by 1.025 for the answer

$22,384.39 = P. We now have the value of the initial investment.

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