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3 years ago

. In a volleyball game, Alexis scored 4 points more than twice the

Mathematics

1 answer:

IrinaK [193]3 years ago

6 0

Answer: 10

Step-by-step explanation:

Alexis Scored 4 more than twice the number of points Jessica scored.

Jessica scored 3

twice the number of 3 would be 3 x 2 which equals six

4 more than twice the number which is 6 would be 10, 4+6=10

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Which is the largest decimal? Please explain. 0.267 0.530000 0.407 0.000011

Slav-nsk [51]

The largest is 0.530000 because it is closest to 1. The 5 is the largest in the tenths place.

4 0

3 years ago

Find the value of x so that the function has the given value. k(x)=7;k(x)=49

geniusboy [140]

Answer:

i don't what you want me to do here...

You gave me the same problem just two different numbers so maybe the answer is 7... idek tho bro

k times x = 7

k times x = 49

Step-by-step explanation:

6 0

3 years ago

| 3. Find the Area of the triangle. 8.6 yd 10.9 yd

Nitella [24]

Given:

The base of the triangle = 8.6 yd

The height of the triangle = 10.9 yd

To find the area of the triangle.

Formula

The area of a triangle with b as base and h as height is

$A=\frac{1}{2}bh$

Now,

Taking, b= 8.6 and h = 10.9 we get,

$A=\frac{1}{2}(8.6)(10.9)$ sq yd

or, $A= 46.87$ sq yd

Hence,

The area of the given triangle is 46.87 sq yd.

7 0

3 years ago

Read 2 more answers

The percentage of body fat of a random sample of 36 men aged 20 to 29 found a sample mean of 14.42. Find a 95% confidence interv

Rina8888 [55]

Answer:

$14.42-1.96\frac{6.95}{\sqrt{36}}=12.150$

$14.42+ 1.96\frac{6.95}{\sqrt{36}}=16.690$

So on this case the 95% confidence interval would be given by (12.150;16.690)

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".

$\bar X=14.42$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=6.95$ represent the population standard deviation

n=36 represent the sample size

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)

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that $z_{\alpha/2}=1.96$