3 years ago

What situation could represent the equation 1/4y = 1.5x

1 answer:

4 0

For this case we have to by definition, if "y" varies directly with "x" it is represented as:

Where:
k: It is the constant of proportionality
We have to:

We clear the variable "y":

Thus, the constant of proportionality is:
Answer:

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Answer:

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3 years ago

Morgan invested $4,200 into two accounts. One account paid 4% interest and the other paid 7.5% interest. She earned 7% interest

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Answer:

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The amount invested at 7.5% was $3,600

Step-by-step explanation:

Let

x ----> the amount invested at 4%

$4,200-x -----> amount invested at 7.5%

we know that

The total interest earned is equal to the interest earned by the amount invested at 4% plus the interest earned by the amount invested at 7.5%

Remember that

$4\%=4/100=0.04$

$7.5\%=7.5/100=0.075$

$7\%=7/100=0.07$

The linear equation that represent this situation is

$0.04x+0.075(4,200-x)=0.07(4,200)$

Solve for x

$0.04x+315-0.075x=294$

$0.075x-0.04x=315-294$

$0.035x=21$

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$\$4,200-x=\$3,600$

therefore

The amount invested at 4% was $600

The amount invested at 7.5% was $3,600

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Answer:

524m

Step-by-step explanation:

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