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3 years ago

Solve for r. 7r + 7= 2r − 3 Enter your answer in the box

Mathematics

1 answer:

leonid [27]3 years ago

3 0

The answer if we go by solving only for "r" Will be -2, in other words r=-2

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You wish to estimate a population proportion with a confidence interval with a margin of error no larger than 0.03. You have a b

NikAS [45]

Answer:

The answer is 0.8788

Step-by-step explanation:

From question given, let us recall the following:

We know that Ƶα /2 * √p (1-p)/n

when we use n≤ 5000/10 =500

P = 0.75

The Margin of error = 0.03

Putting this values together we arrive at

Ƶα/2 = 0.03/√0.75 * 0.25/500

= 1.549

Now,

Ф (1.549) = 0.9394

Therefore the confidence level becomes:

1- (1-∝)/2 = 0.9394

∝ = 0.8788

The answer is 0.8788

8 0

3 years ago

Alfie sells flooring for playgrounds.

dexar [7]

area of playground= 9×15= 135m^2

area of lawn= 3×4=12m^2

total flooring area= 135-12= 123m^2

cost=36×123=$4428

6 0

3 years ago

How many halves make up the whole circle

adell [148]

2 halves make up one whole
Hope this helps!
Vote my brainliest!

6 0

3 years ago

Read 2 more answers

Find the complex fourth roots \[-\sqrt{3}+\iota \] in polar form.

____ [38]

Let $z=-\sqrt3+i$ . Then

$|z|=\sqrt{(-\sqrt3)^2+1^2}=2$

$z$ lies in the second quadrant, so

$\arg z=\pi+\tan^{-1}\left(-\dfrac1{\sqrt3}\right)=\dfrac{5\pi}6$

So we have

$z=2e^{i5\pi/6}$

and the fourth roots of $z$ are

$2^{1/4}e^{i(5\pi/6+k\pi)/4}$

where $k\in\{0,1,2,3\}$ . In particular, they are

$2^{1/4}e^{i(5\pi/6)/4}=2^{1/4}e^{i5\pi/24}$

$2^{1/4}e^{i(5\pi/6+2\pi)/4}=2^{1/4}e^{i17\pi/24}$

$2^{1/4}e^{i(5\pi/6+4\pi)/4}=2^{1/4}e^{i29\pi/24}$

$2^{1/4}e^{i(5\pi/6+6\pi)/4}=2^{1/4}e^{i41\pi/24}$

7 0

3 years ago

The table below shows the relative frequencies of the color of cars bought last month by males and females. Which percentage rep

Pani-rosa [81]

The first thing we must do for this case is to observe the highest relative frequency of the table in the total column.
For the white car we have:
Male = 0.11
Female = 0.20
Total = 0.31
The percentage is given by:
(0.31) * (100) = 31%
Answer:
The percentage that represents the car bought most often is:
31%

6 0

3 years ago