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3 years ago

Is this a function or not a function?

Mathematics

1 answer:

Anna007 [38]3 years ago

5 0

Answer:

It's not a function because the domain repeats.

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Complete the following equation using <,>,= 7_24/4

zmey [24]

It would be 7 > 24/4, since 24/4 equals 6 and 7 is greater than that.

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3 years ago

You are trying to estimate the average amount a family spends on food during a year. In the past the standard deviation of the a

svetoff [14.1K]

Answer:

$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

Step-by-step explanation:

We have the following info:

$ME = 50$ margin of error desired

$\sigma = 1000$ the standard deviation for this case

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 =50 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 99% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=0.01$ . And for this case would be $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

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3 years ago

Convert r=sec thaeta to rectangular form

Maslowich

Multiply both sides by cos
rcos(θ)=sec(θ)cos(θ)=1
x=rcos(θ)
x=1

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4 years ago

The length of the hypotenuse of a 30-60 -90 triangle is 14 units. what is the length of the short leg

kifflom [539]

Recall that the short leg is the side opposite the 30 degrees angle. And the ratio of the short leg to the hypotenuse is 1:2.

Let the length of the short leg be x, then,

$\cfrac{x}{14}=\cfrac{1}{2}\\ \\\Rightarrow2x=14\\ \\\Rightarrow x=\cfrac{14}{2}=7$

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4 years ago

Find the value of 2x+y when x=4 and y3

worty [1.4K]

Answer:

Step-by-step explanation:

Replace the values of x and y into the equation.

2(4) + 3 = 8 + 3

= 11

5 0

3 years ago

Read 2 more answers