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3 years ago

Can you help me with my algebra

Mathematics

1 answer:

Over [174]3 years ago

7 0

Sure. Can u show the question or somthing and I got u fam

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Find the slope of a line that passes through the points (5,4) and (-2,-1)

Anna11 [10]

The slope is 5/7
4-(-1)=5 which is the Y value
5-(-2)=7 which is the X value
Slope =Y/X

7 0

3 years ago

The figure below shows dimensions of a block of foam used to package a triangular shaped product. The foam is in the shape of a

stellarik [79]

Answer:

5,580

Step-by-step explanation:

Rectangle: 36x30x60=6480

Triangle: 1/2x15x20x6=900

6480-900=5,580

5 0

2 years ago

A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c

Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What is the minimum sample size required to create the specified confidence interval

This is n when $M = 0.06, \sigma = 1.1$

$0.06 = 2.575*\frac{1.1}{\sqrt{n}}$

$0.06\sqrt{n} = 2.575*1.1$

$\sqrt{n} = \frac{2.575*1.1}{0.06}$

$(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}$

$n = 2228.6$

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

7 0

3 years ago

A flag measures 90<br> feet by 60 feet. What is the perimeter of<br> this flag?

Temka [501]

300 feet you add 90 twice which gets you 180 and then add 60 twice which gets you 120 and 120 plus 180 is 300

4 0

3 years ago

what is the product of 4x/x-1 and x^2-1/3x+3 expressed in simplest form? A. 4x/3, B.4x^2/3, C. 4x^2/3x(x+1), D. 4(x+1)/3

zvonat [6]

Answer:

Step-by-step explanation:

7 0

2 years ago