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Nataly_w [17]
3 years ago
15

Solve x and y please need it for tomorrow

Mathematics
2 answers:
Evgen [1.6K]3 years ago
4 0
Solve for x by cross multiplying then isolating the variable:
\frac{9}{15}= \frac{x}{10}                     cross multiply
15x=90                     Isolate the variable
x=6
Solve for y by cross multiplying then isolating the variable:
\frac{9}{15} = \frac{6}{y}          cross multiply
9y=90               Isolate the variable
y=10
anastassius [24]3 years ago
3 0
X = 6

y = 10

Hope it helped  : )
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\text{Given that }\$7000 \text{ is compounded semiannualy at a rate of }11\% \text{ for 21 years}\\
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\text{we know that the amount after t year when compounded is given by}\\
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A=P\left ( 1+\frac{r}{n} \right )^{nt}\\
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\text{here P is the principal amoount, so }P=7000,\\
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\text{r is the interest rate, }r=11\%=0.11\\
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\text{n is the number of times in a year, here semiannulay, so }n=2,\\
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\text{and t is the time, so }t=21\\
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\text{so the amount after 21 years is}

A=7000\left ( 1+\frac{0.11}{2} \right )^{2(21)}\\
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\Rightarrow A=7000\left ( 1+0.055 \right )^{42}\\
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3 years ago
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2 years ago
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3 years ago
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