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3 years ago

What is the perimeter of this tile?p

Mathematics

2 answers:

Harlamova29_29 [7]3 years ago

8 0

Answer:

16 inches

Step-by-step explanation:

The tile is rectangular, so the other 2 sides have lengths 2in and 6in.

The perimeter is 2in + 6in + 2in + 6in = 16in

noname [10]3 years ago

8 0

Answer:

Step-by-step explanation:

the long sides are both 6 inches

6+6=12

the short sides are both 2 inches

2+2=4

add all the sides together

12+4=16

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For the function y=-2+5sin(pi/12)(x-2)), what is the minimum value

Lelechka [254]

Assuming the function is

$y=-2+5\sin\left(\dfrac\pi{12}(x-2)\right)$

recall that $-1\le\sin x\le1$ , which means

$-1\le\sin\left(\dfrac\pi{12}(x-2)\right)\le1$
$\implies-5\le5\sin\left(\dfrac\pi{12}(x-2)\right)\le5$
$\implies-7\le-2+5\sin\left(\dfrac\pi{12}(x-2)\right)\le3$

and so the minimum value is -7.

3 0

4 years ago

Read 2 more answers

Your job is to sort and sack marbles for sale. A bag contains 120 marbles, some red and some blue. If there are 80 blue marbles,

Alex

The ratio is 1:2 for every one red there are 2 blue.

5 0

3 years ago

Read 2 more answers

A fast food restaurant executive wishes to know how many fast food meals adults eat each week. They want to construct a 98% conf

adelina 88 [10]

Answer:

$n=(\frac{2.326(1.1)}{0.07})^2 =1336.006 \approx 1337$

So the answer for this case would be n=1337 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)

$\sigma=1.1$ represent the population standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

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

And on this case we have that ME =0.07 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

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

The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formula to find it:"=-NORM.INV(0.01;0;1)", and we got $z_{\alpha/2}=2.326$ , replacing into formula (b) we got:

$n=(\frac{2.326(1.1)}{0.07})^2 =1336.006 \approx 1337$

So the answer for this case would be n=1337 rounded up to the nearest integer

3 0

4 years ago

2(n2 + 1) – 3(n2 – 3) + 3(2n2 – 2),<br> n=(1/4)

IceJOKER [234]

]Answer:

$5\frac{5}{16}$

Step-by-step explanation:

Substitute the value of the variable into the equation and simplify.

$2(\frac{1}{4} ^{2} +1-3(\frac{1}{4} ^{2} -3)+3((2*\frac{1}{4}^{2} )-2)$

Solve it out.

Multiply / divide / add / subtract everything out.

4 0

3 years ago

2a) A store is having a 20%-off sale on all merchandise. If Mai buys one item and saves $13, what was the original price of her

eduard

Answer:

this question is imcompelete

Step-by-step explanation:

was there a total for this question, you can't just find out the orginal purchase with -13 and 20 percent off, you need either s start number or end number

7 0

2 years ago