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2 years ago

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Your class has 26 students, which represents 5% of your school's enrollment. Your friend uses the proportion 5/100 =n/26 to find

the number of students in your school . Explain your friend's error? Can you guys please help me on this problem. By the way the / is a fraction. Thanks!

1 answer:

dedylja [7]2 years ago

7 0

26 is a part of the whole. the proportion should be set up:

(26/x) = (5/100) It's the overall enrollment that is being asked.

If you also need to solve: Cross multiply, 26(100) = 5x, 2600 = 5x, divide both sides by 5, 520 is the enrollment

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Answer:

Your solution is (-10/7, 92/7)

Step-by-step explanation:

12x + y = -4

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To use substitution, we want to plug one variable's equation into the other equation.

We can see that y is already solved for us. Plug y into the first equation.

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Combine like terms.

14x + 16 = -4

Subtract 16 from both sides.

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Divide both sides by 14.

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2 years ago

Compound interest In Exercise,$3000 is invested in an account at interest rate r,compounded continuously.Find the time required

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Answer:

(a) 8.15

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Step-by-step explanation:

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$log_{e}2 = log_{e}e^{0.085t}$

But $log_{e}e = 1$

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$9000 = 3000e^{0.085t}$

$\frac{9000}{3000} = e^{0.085t}$

$3 = e^{0.085t}$

Take $log_{e}$ of both sides

$log_{e}3 = log_{e}e^{0.085t}$

But $log_{e}e = 1$

∴ $ln3 = 0.085t$

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Answer:

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