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Masja [62]
3 years ago
5

On a standardized exam, the scores are normally distributed with a mean of 120 and

Mathematics
1 answer:
Ierofanga [76]3 years ago
6 0

Answer: z= -0.5

Step-by-step explanation: mean m=120 and deviation s=10.

Z = (x-m)/s= (115-120)/10

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Question 18 please help
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Answer:

  see below

Step-by-step explanation:

No simplification is possible as there aren't any factors that can be combined or cancelled. The exponents can be made positive by moving the variable to the other side of the fraction bar.

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3 years ago
Simplify the expression by combining like
Dennis_Churaev [7]

Answer:

9x² + 5x

Step-by-step explanation:

4x² + 6x + 5x²-x

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6 0
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3 years ago
I need help answering this question!
Molodets [167]

Answer:

2x+7=-3+2x multiply what’s in the bracket by the negative sign

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Step-by-step explanation:

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8 0
3 years ago
The houses on a city block were thought to be valued at $169,000, $133,000, $171,000, $145,000, $180,000, $172,000, and $149,000
Ipatiy [6.2K]

Answer:

$184000

Step-by-step explanation:

Given : The houses on a city block were thought to be valued at $169,000, $133,000, $171,000, $145,000, $180,000, $172,000, and $149,000, respectively, but a public assessor has determined that they were all undervalued by $15,000.

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Solution:

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Arrange the data in ascending order.

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So, Median = $169,000+$15000=$184000

Hence the median value of the houses is $184000

4 0
3 years ago
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