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3 years ago

URGENT!!! 20POINTS

Mathematics

2 answers:

Flura [38]3 years ago

6 0

(Option A), -7x + 12

<h2>Mark as Brainliest</h2>

NeX [460]3 years ago

5 0

Answer: (Option A), -7x + 12

you're welcome

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A sum of money is invested for 3 years at a certain rate of interest. Had the rate of interest been 1 %more it would have fetche

Allisa [31]

Answer: the sum invested = $600

Step-by-step explanation:

Interest (I) = Principal (P) × rate (r) × time (t)

Original amount: I = P × r × 3

Increased by 1%: I + 18 = P × (1+ .01)r × 3

Substitute I with Prt and set the equations equal to each other to find r:

3Pr + 18 = 3.03Pr

Solve for Pr:

18 = 0.03Pr

÷0.03 ÷ 0.03

600 = Pr

6 0

3 years ago

Which of the points listed is the same distance from the yy-axis as the point (-1.5, 6)-1.5, 6?

ohaa [14]

-(1.5, -3)
think of the y axis intercepting the x axis at coordinates (0,0)
-they then said their point is 1.5 left of the y axis

-now all you have to do is to find another x value of that same distance (x,y)

7 0

3 years ago

Read 2 more answers

Data on IQ for 33 first graders are given as follows: 82, 96, 99, 102, 103, 103, 106, 107, 108, 108, 108, 108, 109, 110, 110, 11

Dahasolnce [82]

Answer:

$\bar X = \frac{\sum_{i=1}^n x_i}{n}$

Where n represent the sample size, on this case n =33. If we use this formula we got:

$\bar X = 113.727$

And for this case we know that is the best estimator since is an unbiased estimator for the true population mean since we have this:

$E(\bar X) = E(\frac{\sum_{i=1}^n x_i}{n})= \frac{1}{n} \sum_{i=1}^n E(X_i) = \frac{n\mu}{n} = \mu$

Step-by-step explanation:

For this case we have the following values given:

82, 96, 99, 102, 103, 103, 106, 107, 108, 108, 108, 108, 109, 110, 110, 111, 113, 113, 113, 113, 115, 115, 118, 118, 119, 121, 122, 122, 127, 132, 136, 140, 146

And we want to estimate the mean value of IQ for the conceptual population.

For this case we can use as estimator for the population mean the sample mean. We know that the sample mean is given by this formula:

$\bar X = \frac{\sum_{i=1}^n x_i}{n}$

Where n represent the sample size, on this case n =33. If we use this formula we got:

$\bar X = 113.727$

And for this case we know that is the best estimator since is an unbiased estimator for the true population mean since we have this:

$E(\bar X) = E(\frac{\sum_{i=1}^n x_i}{n})= \frac{1}{n} \sum_{i=1}^n E(X_i) = \frac{n\mu}{n} = \mu$

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3 years ago

Twice the difference of three times a number and eight,divided by four

mario62 [17]

"Twice the difference of three times a number and eight, divided by four" can be displayed as:

2((8 - 3x)/4)

6 0

3 years ago

Why do you multiply by a power of 10 when writing a repeating decimal as a rational number

Rudiy27

Answer:

The idea is to multiply by 10 so that when we subtract the original number from the multiple, the repeating part cancels out.

4 0

2 years ago

****URGENT!!!**** 20POINTS

URGENT!!! 20POINTS