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sergey [27]
3 years ago
15

Last month Dory biked 11 times as many miles as Karly. Together they biked a total of 156 miles. How many miles did Dory bike la

st month?
Mathematics
2 answers:
Oduvanchick [21]3 years ago
8 0
Divide 156 by 11= 14.18 and you have your answer
asambeis [7]3 years ago
4 0
To solve this, simply divide the total number of miles by 11. 

156 ÷ 11 = 14.18 miles

Dory biked 14.18 miles
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The average cost of an IRS Form 1040 tax filing at Thetis Tax Service is $157.00. Assuming a normal distribution, if 70 percent
juin [17]

Answer:

The standard deviation is $26.67.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 157

Assuming a normal distribution, if 70 percent of the filings cost less than $171.00, what is the standard deviation?

This means that when X = 171, Z has a pvalue of 0.7. So when Z = 0.525.

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

0.525 = \frac{171 - 157}{\sigma}

0.525\sigma = 14

\sigma = \frac{14}{0.525}

\sigma = 26.67

The standard deviation is $26.67.

6 0
3 years ago
Question 9 options:
vazorg [7]

Answer:

  • area = 14 square units
  • perimeter = 19.1 units

Step-by-step explanation:

The base of the triangle extends from x=2 to x=6, a distance of 4 units.

The height of the triangle is 9 - 2 = 7 units.

Then the area is ...

  A = (1/2)(4 units)(7 units) = 14 units^2

__

The length of the hypotenuse is given by the Pythagorean theorem.

  h^2 = 4^2 +7^2 = 16 +49 = 65

  h = √65 ≈ 8.1

The perimeter is the sum of the side lengths:

  P = 4 + 7 + 8.1 = 19.1 . . . units

3 0
3 years ago
AB = 15, BC = 10, and CD= 7. Find the length DA.
harkovskaia [24]

Answer:

  451. No, the angles are wrong.

Step-by-step explanation:

450. AB = 15, BC = 10, and CD= 7. Find the length DA.

  This cannot be done without additional information about the sort of figure that ABCD is. If these are points on a line segment, we need to know their order. If these are points on a quadrilateral, we need to know its description in more detail.

If these are points ordered ABCD on a line, then AD = 15+10+7 = 32.

__

451. See the attached figure. BPQD is not a parallelogram: BCQ is not a straight line. (The internal angles of a pentagon are 108°, but would need to be 120° for BCQ to be a straight line, making BP parallel to DQ.) Instead, BPQD is an isosceles trapezoid.

4 0
3 years ago
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Komok [63]

Answer:  22.2,  22,200

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5 0
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Nikitich [7]

Answer:

25(p+25q)

Step-by-step explanation:

50 and 25 have 25 in common so you divide that out of the equation

3 0
2 years ago
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