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Vlad1618 [11]
1 year ago
6

Quick I need an answer to this Queston:

Mathematics
1 answer:
fiasKO [112]1 year ago
6 0

Step-by-step explanation:

-  \frac{3}{4} x + 2 \frac{1}{4 } =  \frac{1}{2} x + 1

-  \frac{3}{4} x +  \frac{9}{4}  =  \frac{1}{2} x +  \frac{2}{2}

\frac{ - 3x + 9}{4}  =  \frac{2x + 4}{4}

- 3x + 9 = 2x + 4

- 3x - 2x = 4 - 9

- 5x =  - 5

x =  \frac{ - 5}{ - 5}

x = 1

The answer is C.

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Solve the system algebraically. 3x - 2y - 1 = 0 y = 5x + 4 What is the solution? {(-9/7,-17/7)} {(9/7,17/7)} {(9/7,-17/7)}
lutik1710 [3]
3x - 2y - 1 = 0
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3x - 2(5x + 4) - 1 = 0
3x - 10x - 8 - 1 = 0
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3 0
3 years ago
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A graduate school entrance exam has scores that are normally distributed with a mean of 560 and a standard deviation of 90. What
9966 [12]

26.8% of examinees will score between 600 and 700.

This question is based on z score concept.

A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values. Z-score is measured in terms of standard deviations from the mean. If a Z-score is 0, it indicates that the data point's score is identical to the mean score.

z={x-\mu  \over \sigma }

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Given:

μ = 560

σ = 90

For

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for x = 700

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for x = 600

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P-value from Z-Table:

P(560<x<600) = P(x<600) - 0.5 = 0.17164

∴ P(600<x<700) = P(560<x<700) - P(560<x<600)

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∴26.8% percentage of examinees will score between 600 and 700.

Learn more about Z score here :

brainly.com/question/15016913

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4 0
2 years ago
Plz help with 12<br> Will give brainliest
Irina-Kira [14]

Answer:

True, based on the <em>Transitive Property of Equality</em>.

Step-by-step explanation:

Note that the <em>Transitive Property of Equality </em>states that "If a = b, & b = c, then a = c.

In this case it is the same.

∠1 ≅ ∠2 (because both are complementary), ∠1 ≅ ∠3 (again, both are complementary), then based on the Transitive Property, ∠2 ≅ ∠3, making all of them complementary angles

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Answer:

A

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