All categories

3 years ago

Mandisa draws a rectangle to represent the area of her yard. The area can be represented by 10x2 – 13x – 14.

2 answers:

7 0

The area of a rectangle can be represented as:
Area = Length x Width

10x2 – 13x – 14 can be factorised as:
(x – 2) (10x + 7)

Therefore the width and length are:
(x – 2) and (10x + 7)

Hope that helps you :)

Dennis_Churaev [7]3 years ago

3 0

Answer:

I believe the answer is C.

You might be interested in

The heights of baby giraffe are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If 100 b

ANEK [815]

Answer:

$P(\bar X$

And we can solve this using the following z score formula:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we use this formula we got:

$z = \frac{63-63.6}{\frac{2.5}{\sqrt{100}}}= -2.4$

So we can find this probability equivalently like this:

$P( Z$

Step-by-step explanation:

Previous concepts

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

$X \sim N(63.6,2.5)$

Where $\mu=63.6$ and $\sigma=2.5$

We select n =100. Since the distribution for X is normal then we know that the distribution for the sample mean $\bar X$ is given by:

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

We want this probability:

$P(\bar X$

And we can solve this using the following z score formula:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we use this formula we got:

$z = \frac{63-63.6}{\frac{2.5}{\sqrt{100}}}= -2.4$

So we can find this probability equivalently like this:

$P( Z$

4 0

3 years ago

i kind of know its C need 2nd opinion A tire manufacturer took a random sample of 50 tires and found that 3 were defective. In a

den301095 [7]

It's kind of not C.

Solve this proportion for 'x':

3/50 = x/2400

Hint: Cross-multiply the proportion, then do what you need to do.

6 0

3 years ago

A calculator is broken so that the only keys that still work are the $\sin$, $\cos$, $\tan$, $\cot$, $\arcsin$, $\arccos$, and $

miskamm [114]

What is this check the q again

7 0

2 years ago

The intersection of roads M and N creates a 41.4 degree angle. What are the complimentary and supplementary angles of this inter

Keith_Richards [23]

Supplementary angles are two angles which sum up to 180 degrees while complementary angled are those the sum is 90 degrees. Therefore, the complementary of 41.4 is 90-41.4 = 48.6 and the supplement would be 180-41.4= 138.6.

3 0

3 years ago

Ana filled her gas tank up with 16 gallons. her gas tank loses 0.04 of a gallon every mile she drives. how many gallons will be

kirza4 [7]

Answer:

8.8 gallons left in the gas tank.

Step-by-step explanation:

180 x 0.04 = 7.2

16 - 7.2 = 8.8

7 0

3 years ago