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bagirrra123 [75]
3 years ago
6

Help! no links please!

Mathematics
2 answers:
Simora [160]3 years ago
6 0

Answer: D

Step-by-step explanation:

tangare [24]3 years ago
3 0

Answer:

a) 70

b) 9

c) 9

d) 52

Step-by-step explanation:

Area of a rectangle is l*w  l=12 and w=6: 12*6=70

Area of triange A is 1/2*b*h, b=3 and h=6: 1/2*3*6=9

Area of triangle B is 1/2*b*h, b=3 and h=6: 1/2*3*6=9

Area of parallelogram is Area of rectangle- Area of triangle A - Area of triangle B: 70-9-9=52

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when 1580 is divided into 13 equal parts, the remainder is 7. What is the correct way to write the quotient
Alisiya [41]

_121_ R7 or 121 7/13
13)1580
13
28
26
20
13
7
5 0
3 years ago
Read 2 more answers
Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of er
Vikentia [17]

Answer:

ME=1.998 \frac{4}{\sqrt{64}}=0.999 \approx 1

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 =69 represent the sample mean for the sample  

\mu population mean

s=4.0 represent the sample standard deviation

n=64 represent the sample size  

Assuming the X follows a normal distribution

X \sim N(\mu, \sigma)

The sample mean \bar X have the following distribution:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

The margin of error for the sample mean is given by this formula:

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

Since we have the sample standard deviation we can estimate the margin of error like this:

ME=t_{\alpha/2}\frac{s}{\sqrt{n}}

The next step would be find the value of \z_{\alpha/2}, \alpha=1-0.95=0.05 and \alpha/2=0.025

We can find the degrees of freedom like this:

df=n-1=64-1=63

And we can find the critical value with the following code in excel for example: "=T.INV(0.025,63)" and we got:

t_{\alpha/2}=\pm 1.998

And the margin of error would be :

ME=1.998 \frac{4}{\sqrt{64}}=0.999 \approx 1

3 0
3 years ago
187 is 55% how do you find the answer step by step that way I know how to solve problems like these.
IceJOKER [234]

Answer:

271.5

Step-by-step explanation:

100-55=45

45% of 187

187*45=8415

8415/100=84.15

84.15 is 45% of 187

271.15

5 0
3 years ago
Read 2 more answers
Charlene is wrapping the box below. How much wrapping paper will she need? *
Anit [1.1K]

Answer:

286 in³

Step-by-step explanation:

7×5 = 35

35×2 = 70in

9×5 = 45

45×2 = 90in

9×7 = 63

63×2 = 126in

70+90+126

=286in³

5 0
3 years ago
Can someone help me ?
prisoha [69]
I’m pretty sure there are infinite solutions as the system of equations are equivalent to each other.
7 0
3 years ago
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