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1 year ago

HELP PLZZ ANWSER I KNOW

Mathematics

1 answer:

marishachu [46]1 year ago

5 0

Answer:

2(w+10)=50

Step-by-step explanation:

rectangle two sides are equal and the other two sides are equal

so we know two sides are ten in this equation the w can be the unknown sides so 2*w and 2*10 = 50

2(15+10)=50

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A used car has a value of $15,250 when it is purchased in 2012. The value of the car decreases at a rate of 7.5% per year. Write

horrorfan [7]

7.5% is 3/40. The equation is y=15250(1-3/40)ˣ=15250(37/40)ˣ.
When x=8 this becomes $8173.42.

3 0

2 years ago

Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points. Rachel scored 78 p

Artemon [7]

Answer:

Keenan's z-score was of 0.61.

Rachel's z-score was of 0.81.

Step-by-step explanation:

Z-score:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points.

This means that $X = 80, \mu = 77, \sigma = 4.9$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{80 - 77}{4.9}$

$Z = 0.61$

Keenan's z-score was of 0.61.

Rachel scored 78 points on an exam that had a mean score of 75 points and a standard deviation of 3.7 points.

This means that $X = 78, \mu = 75, \sigma = 3.7$ . So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{75 - 78}{3.7}$

$Z = 0.81$

Rachel's z-score was of 0.81.

6 0

2 years ago

Don't get any of this

Serga [27]

Answer:

the value of the printer is going down over the years because it is getting older. all you need to do for this is label the x and y axis with the nbers on the graph and then fill it in

has ur teacher gone over how to fill in graphs yet?

5 0

2 years ago

Read 2 more answers

Compare 51.5 hectograms to 51,500 decigrams. How do each of these values compare to a gram and which represents a larger mass?

snow_lady [41]

51.5 Hectograms + 5100 Grams
51,500 Decigrams = 5100 Grams

They have same mass because they equal each other.

5 0

2 years ago

Read 2 more answers

Solve for x. A. 37 B. 27 C. 30 D. 31

dexar [7]

Answer:

Step-by-step explanation:

The formula for finding the relationship between a secant and a tangent is

tangent length ^2 = external segment secant/full length of secant

In this case

60^2 = 48*(x + 48) Expand

3600 = 48*(x + 48) Remove the brackets/

3600 = 48x + 48^2 Expand

3600 = 48x + 2304 Subtract 2304 from both sides

3600 - 2304 = 48x

1296 = 48x Divide both sides by 48

1296 / 48 = x

x = 27

8 0

1 year ago

HELP PLZZ ANWSER I KNOW​

HELP PLZZ ANWSER I KNOW