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professor190 [17]
3 years ago
13

(I have two questions in 1 cause I only have 11 points)

Mathematics
1 answer:
yuradex [85]3 years ago
4 0
Question 1:

If 18 earmuffs fit on one shelf then divide 567 by 18 which is 31.5


Question 2:
Do the same thing for this one, divide 327 by 12 and you get $27.25
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Cathy lives in a state where speeders are fined $15 for each mile per hour over the speed limit. Cathy was given a ticket for $1
Simora [160]

Answer:

Cathy was driving at a speed of 67 miles per hour.

Step-by-step explanation:

Fined $15 for each mile per hour over the speed limit. Cathy was given a ticket for $105.

We solve this using a rule of three.

1 mile - $15

x miles - $105

Applying cross multiplication:

15x = 105

x = 105/5 = 7.

Cathy was 7 miles above the speed limit.

How fast was Cathy driving?

7 miles above the speed limit of 60 miles per hour, so 60 + 7 = 67 miles per hour.

Cathy was driving at a speed of 67 miles per hour.

3 0
3 years ago
What is the value of r for 19 and 20?
nata0808 [166]

Answer:

19.) r = -4    20.) r = 1

Step-by-step explanation:

19.) Because we know the slope and have some points, we can use point-slope form to find the equation.

Point-slope form is:

y - y1 = m(x - x1)

Substitute the numbers into the equation:

y - 3 = 7/6(x - 1)

y - 3 = 7/6x -7/6

y = 7/6x + 11/6

Now that we know the equation, we can put in the x value to find the y (In this case, y = r):

r = 7/6(-5) + 11/6

r = -35/6 + 11/6

r = -4

20.) Because the slope is undefined, that means on the graph, the line will appear straight and vertical. This means the equation will be something like x = a number.

We have the point (1,4). Since we know that the x value will never change, we know that r will have to equal 1 as well.

r = 1

4 0
3 years ago
what is the measurement of the fourth angle of a quadrilateral if the others measure 80 degrees 120 degrees and 65 degrees
ololo11 [35]
The angles add up to 360 360-265 is 95 95 is the last angle
8 0
3 years ago
Due to normality, the formula for computing z is the same for a single data value, as it is
katrin2010 [14]

Using the <u>Central Limit Theorem</u>, the statement is false, as for the averages of  the data values for a sample group, the standard error is s = \frac{\sigma}{\sqrt{n}}, hence, the formula is:

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

While for a single value, it is:

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

In a normal distribution with mean and standard deviation , the z-score of a measure X is given by:

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

  • It 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, which is the percentile of X.
  • By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation s = \frac{\sigma}{\sqrt{n}}.

Hence, the formulas are different, and for an average of the data values for a sample group it is:

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

A similar problem is given at brainly.com/question/24663213

8 0
2 years ago
If there are 10 Adam's on the left side of a balanced chemical equation how many will be on the right
aev [14]

Answer:4

Step-by-step explanation:

3 0
3 years ago
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