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3 years ago

HELP ME PLEASE I NEED ITTTTTT I WILL REWARD

Mathematics

1 answer:

AleksandrR [38]3 years ago

4 0

Your answer would be false.

This is because although the circle is centered around (0, 2) as the first part of the equation, x² + (y - 2)² suggests, but as the equation equals 12, the radius of the circle must be √12.

√12 = 3.46, so around 3.5, and the radius of the circle pictured is 4, which we can see as the circle passes through the point (0, -2), which is 4 units away from the centre.

Therefore, the equation has the wrong radius and is therefore not the circle illustrated.

I hope this helps!

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Calculate the unpaid balance, finance charge, and new balance using the unpaid balance method. Note: interest rate is given as a

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Answer:

The new balance will be $385.04.

Step-by-step explanation:

Previous balance = $179.32

Payments/credits = $85.00

Unpaid balance = $179.32+85$ = $264.32

Monthly rate = 1.25%

Finance charge = $0.0125\times264.32$ = $3.30

New purchases = $117.42

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3 years ago

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Linear Equations & Linear Systems:Question 5

Andreas93 [3]

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3 years ago

When obtaining a confidence interval for a population mean in the case of a finite population of size N and a sample size n whic

Elanso [62]

Answer:

95% Confidence interval for the mean

$142.8 \leq\mu\leq158.4$

Step-by-step explanation:

We have to calculate a 95% confidence interval for the mean of a finite population.

The error is multiplied by the following finite population correction factor:

$cf=\sqrt{\frac{N-n}{N-1} }$

The standard deviation can be estimated as

$\sigma=\frac{s}{\sqrt{n}} \sqrt{\frac{N-n}{N-1} } =\frac{24.4}{\sqrt{32} }* \sqrt{\frac{200-32}{200-1} }=3.963$

The 95% confidence interval has a z value of 1.96, so it becomes:

$M-z*\sigma_c\leq\mu\leq M+z*\sigma_c\\\\150.6-1.96*3.963\leq\mu\leq 150.6+1.96*3.963\\\\ 142.8 \leq\mu\leq 158.4$

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3 years ago

From the beginning of the day the temperature rose 15° so that by 4 pm it was 87°. What was the temperature at the start of the

zubka84 [21]

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3 years ago

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If [x] denotes the least integer greater than or equal to x and [x/2] = 0, which of the following could be the value of x?A. -2B

podryga [215]

Answer:

B) -3/2

Step-by-step explanation:

If [x/2]=0 then x/2 is a number such that the least integer greater than or equal to x/2 is 0. We can rewrite this as the inequality x/2≤0. Then, the value of x in C, D and E is wrong because they are positive numbers, then x/2 would be a positive number which contradicts this inequality.

Now, 0 is the least integer that satisfies this inequality, therefore we cannot have that x/2≤-1 since -1 is an integer and -1<0. Then x/2>-1. This discards A as wrong, because for x=-2, x/2=-1, contrary to x/2>-1.

Thus B is the right answer. To verify, if x=-3/2, then x/2=-3/4 and we have that -1<-3/4≤0 as required.

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3 years ago