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3 years ago

(4/5-715) +15= Hurry

Mathematics

2 answers:

navik [9.2K]3 years ago

6 0

Answer:

-699.2

Step-by-step explanation:

notsponge [240]3 years ago

6 0

Exact form: -3496/5
Decimal form: -699.2
Mixed Number form: -6991/5

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Find the x in PQR, please

skad [1K]

Answer:

Answer is A

Step-by-step explanation:

Use the the pythagorean theorem

x=√12²+5²

x=13

4 0

3 years ago

Read 2 more answers

IF A CUBE HAS VOLUME OF 1,331 MM, WHAT IS THE AREA OF THE BASE OF IT IN SQUARE MILLIMETERS

monitta

1331= lwh or 1331= x^3

So take cube root of both sides and you will get 11.

Since the formula for area is length times width, the answer is 11x11 which equals 121.

So the square area of the base is 121mm^2

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3 years ago

2x + 3y = 12 Complete the missing value in the solution to the equation.<br>

pychu [463]

Answer:

X = 2 Y = 1

Step-by-step explanation:

2*2 = 4 and 3*1 = 3 add them and you get 7 add the 2 and 3 and you get 5 when you add 5 and 7 you get 12.

2*2 + 3*1 = 12

4 0

4 years ago

Read 2 more answers

Assume that the one-way commute time of an UoU student from his house to school is a normally distributed random variable which

Marizza181 [45]

Answer:

$n=(\frac{1.960(10)}{5})^2 =15.36 \approx 16$

So the answer for this case would be n=16 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma=10$ represent the sample standard deviation

n represent the sample size

ME=5 represent the margin of error

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (2)

And on this case we have that ME =5 and we are interested in order to find the value of n, if we solve n from equation (2) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (3)

The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025;0;1)", and we got $z_{\alpha/2}=1.96$ , replacing into formula (3) we got:

$n=(\frac{1.960(10)}{5})^2 =15.36 \approx 16$

So the answer for this case would be n=16 rounded up to the nearest integer

3 0

3 years ago

I need help with an equation... I can't understand it I've tried it a couple of times and I still get it wrong...so help plz?

Semenov [28]

Answer:

(f·g)(x) = x³ -8x² +20x -16

Step-by-step explanation:

The distributive property is useful for this.

(f·g)(x) = f(x)·g(x) = (x² -6x +8)(x -2)

= x(x² -6x +8) -2(x² -6x +8)

= x³ -6x² +8x -2x² +12x -16

(f·g)(x) = x³ -8x² +20x -16

_____

<em>Additional comment</em>

I find it convenient to separate the terms of the shortest polynomial. That way, the distributive property doesn't need to be used quite so many times. Of course, any outside minus sign applies to all terms inside parentheses.

8 0

3 years ago