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devlian [24]
3 years ago
15

Z varies jointly with x and y. when x=2 and y=3, z=60. what is the value of z when x=4 and y=9?

Mathematics
1 answer:
laiz [17]3 years ago
3 0
<span>Z $ xy then Z = Kxy. When x = 2 and y = 3, and Z = 60, our constant of variation becomes 60 = K * 2 * 3 K = 10. Our constant of proportionality equals 10. We would need that in the second part of the equation. When x = 4 and y = 9, we have Z = 10 * 4 * 9 = 360</span>
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4 years ago
What is the balance after 7 years if you deposit $2800 in an account that pays 4% interest compounded yearly ?
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Answer:the balance after 7 years is $3216

Step-by-step explanation:

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It was compounded yearly. This means that it was compounded once in a year. So

n = 1

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6 0
4 years ago
Josiah ran 4/5 mile. How many tenths are equal to 4/5 mile.
kati45 [8]
<span>Josiah ran 4/5 miles. We need to find the tenths that is present to the given number which is 4/5.
4/5 is a fraction, and since we are looking for tenths which is a decimal value. Thus, we need to convert this fraction to decimals.
To convert, simply divide the numerator by the denominator.
In the given number, 4 is our numerator and 5 is our denominator.
=> 4 / 5
=> 0.8
Therefore, 8 is the value of tenths because it is the number next to the decimal point.

</span>



4 0
4 years ago
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