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UkoKoshka [18]
1 year ago
5

3x+8y=15 2x−8y=10 Solve for x

Mathematics
1 answer:
exis [7]1 year ago
6 0
X=5 Y=0 hope this helps
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Anyone help me with this? I will give you brainiest!
kow [346]
3 necklaces were sold and they have got 45 revenue
4 0
3 years ago
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Assume that the heights of women are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If
djyliett [7]

Answer:

Option a. 0.9811

Step-by-step explanation:

First, you need to use a normal distribution table to solve this. If you don't have it, then see the attached table so you can guide yourself.

Now, we want to know the probability of randomly select 75 women whose height have a mean between 63 and 65 inches, knowing that in general, the mean is 63.5 and standard deviation of 2.5

To do this, you should calculate first the Z score value for both heights, one for 63 inches and the other with 65 inches. Then, with those values, we'll look the table to get the area under the curve, and thus, the probability. To calculate Z use the following expression:

Z = x - μ / (σ/√n)

Where:

μ: mean height

σ: standard deviation

x: height required

n: sample population

We have all the data so let's calculate both values of Z:

Z1 = 63 - 63.6 / (2.5/√75) = -2.08

Z2 = 65 - 63.6 / (2-5/√75) = 4.85

With these Z score, let's watch the table, and see which area belongs to,

In the case of Z1, the area is 0.0188, while Z2 is 1.

To know the probability, all we need to do is substract those values:

P = 1 - 0.0188 = 0.9812

Option a) is the most accurate and closest result to this.

5 0
3 years ago
Which type of angle pair are
zavuch27 [327]
Thank u for posting a picture!
And I believe that it would be vertical because they are the same and they r across from each other and share the same point of S
Hope this helps have a nice day!!
8 0
3 years ago
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What is the slope of the line that passes through the points (9, 2) and
vlada-n [284]

Answer:

Slope (m) = infinity

Step-by-step explanation:

Given points:

⇒ (9, 2) and (9, 27)

In order to find the <em>slope</em> of these points, we must use the <em>slope</em> formula.

So the formula is ⇒ y₂ - y₁ / x₂ - x₁

<em>Plug</em> in the<em> given </em>points:

⇒ 27 - 2 / 9 - 9

Solve both the top and bottom (<em>numerator and denominator</em>):

⇒ 25 / 0

Divide:

⇒<em> Undefined. </em>

(<em>Anything</em><em> </em>divided by <em>zero</em> is undefined).

4 0
1 year ago
Mary has $267 in her checking account. She writes checks for $33, $65, and $112. What is the balance in her account now?
nata0808 [166]

Answer:

267 - 112 - 65 - 33 = $57

Step-by-step explanation:

subtract to get the answer

5 0
3 years ago
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