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dimulka [17.4K]
3 years ago
7

9. Write a real-world problem that could be represented by 7.5x = 5.5x + 25. (Example 4)

Mathematics
1 answer:
igomit [66]3 years ago
8 0

Answer:

There are a lote of examples for a real world problem that could be solve with the equation, you need that the x in both sides represents the same thing.

This is what i came up with:

Sam bought 7.5 kilos of oranges, which cost the same as buying 5.5 kilos of oranges plus $ 25

The equation that describes the above is

7.5x = 5.5x + 25

where x is kilograms of orange.

Solving for x you will find the cost of 1 kilogram:

7.5x-5.5x=25\\2x=25\\x=12.5

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Answer:

$2191.12

Step-by-step explanation:

We are asked to find the value of a bond after 10 years, if you invest $1000 in a savings bond that pays 4% interest, compounded semi-annually.

FV=C_0\times (1+r)^n, where,

C_0=\text{Initial amount},

r = Rate of return in decimal form.

n = Number of periods.

Since interest is compounded semi-annually, so 'n' will be 2 times 10 that is 20.

4\%=\frac{4}{100}=0.04

FV=\$1,000\times (1+0.04)^{20}

FV=\$1,000\times (1.04)^{20}

FV=\$1,000\times 2.1911231430334194

FV=\$2191.1231430334194

FV\approx \$2191.12

Therefore, the bond would be $2191.12 worth in 10 years.

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3 years ago
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Answer:

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