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NeX [460]
3 years ago
13

The length of a page in a yearbook is 7 inches. The top margin is 1/2 inch, and the bottom margin in 3/4 inch. What is the lengt

h of the page inside the margins?
Mathematics
1 answer:
Andrei [34K]3 years ago
7 0
Can you be more specific?
 
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Two cars leave towns 300 kilometers apart at the same time and travel toward each other. One car's rate is 10 kilometers per hou
mel-nik [20]

300 \div 120 = 2.5
so 2.5 kilometers per second
3 0
3 years ago
Area of rectangular figures​
iren2701 [21]

Answer:

531 in^2

Step-by-step explanation:

21 x 18 = 378 in^2

17 x 9 = 153 in^2

378 + 153 = 531 in^2

3 0
2 years ago
Select the most accurate statement regarding the normal distribution. Group of answer choices It is always the appropriate distr
PSYCHO15rus [73]

Answer:

There is a 95% chance that values will be within ±2 standard deviations of the mean.

Step-by-step explanation:

Normal Probability Distribution:

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.

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this question:

According to the empirical rule, 95% of the measures are within 2 standard deviations of the mean. So the correct statement is:

There is a 95% chance that values will be within ±2 standard deviations of the mean.

4 0
3 years ago
Solve for x. The triangles in each pair are similar
liubo4ka [24]
9x +1= 0
9x/9 +1-1=0
X= 9-1
X= 8
3 0
2 years ago
Write the missing exponent.
beks73 [17]

Answer:

fffffffffffffffffffffffffffffffffffffffffffffffff

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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