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Blababa [14]
3 years ago
10

The midpoint of chord AB is ( , ), and the slope of chord AB is

Mathematics
1 answer:
kykrilka [37]3 years ago
7 0

Answer:

See solution below

Step-by-step explanation:

Let the coordinate's of A and B be (1, 0) and (2,4) respectively

midpoint M (X, Y) = [(x1+x2/2, y1+y2/2)]

X = x1+x2/2

X = 1+2/2

X = 3/2

X = 1.5

Y = y1+y2/2

Y = 0+4/2

Y = 4/2

Y = 2

Hence the required midpoint (X, Y) is (1.5, 2)

Slope m = y2-y1/x2-x1

m = 4-0/2-1

m = 4/1

m = 4

Hence the slope is 4

<em>Note that the coordinates are assumed but the same calculation can be employed for any other coordinates</em>

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A food company sells salmon to various customers. The mean weight of the salmon is 37 lb with a standard deviation of 2 lbs. The
brilliants [131]

Answer:

The standard deviation for the mean weigth of Salmon is 2/3 lbs for restaurants, 2/7 lbs for grocery stores and 1/4 lbs for discount order stores.

Step-by-step explanation:

The mean sample of the sum of n random variables is

\overline{X} = \frac{X_1+X_2+...+X_n}{n}

If X_1, ..., X_n are indentically distributed and independent, like in the situation of the problem, then the variance of X_1 + .... + X_n will be the sum of the variances, in other words, it will be n times the variance of X_1 .

However if we multiply this mean by 1/n (in other words, divide by n), then we have to divide the variance by 1/n², thus \overkine{X} = \frac{V(X_1)}{n} and as a result, the standard deviation of \overline{X} is the standard deviation of X_1 divided by \sqrt{n} .

Since the standard deviation of the weigth of a Salmon is 2 lbs, then the standard deviations for the mean weigth will be:

  • Restaurants: We have boxes with 9 salmon each, so it will be \frac{2}{\sqrt{9}} = \frac{2}{3}
  • Grocery stores: Each carton has 49 salmon, thus the standard deviation is \frac{2}{\sqrt{49}} = \frac{2}{7}
  • Discount outlet stores: Each pallet has 64 salmon, as a result, the standard deviation is \frac{2}{\sqrt{64}} = \frac{1}{4}

We conclude that de standard deivation of the mean weigth of salmon of the types of shipment given is: 2/3 lbs for restaurants, 2/7 lbs for grocery stores and 1/4 lbs for discount outlet stores.

7 0
3 years ago
If you bought something for $372.60 including an 8% tax, what was the price before the tax?
Dvinal [7]

Answer:

  • $345

Step-by-step explanation:

<u>Let the price before tax be x, then we have:</u>

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  • x + 0.08x = 372.60
  • 1.08x = 372.60
  • x = 372.60 / 1.08
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The initial price was $345

7 0
2 years ago
Please help me! (this is from khan academy 6th grade math!)
Svetach [21]

Answer:

1st → 1st

2nd → 3rd

3rd → 2nd

Step-by-step explanation:

just divide the first set of student wishes to the second set of students in the same question. the 1st for example

x-ray to all students is 6/ 36= 1/6 = 1:6

for all students, you add all the students in the table

8 0
2 years ago
The following table shows the number of heart beats for 4 animals for example the pigs heart beats 225 times in 3 ‘minutes
xxTIMURxx [149]

Answer:

The cow's heart beats at a rate of    65  beats per minute.

Step-by-step explanation:

Pig: 225 ÷ 3 = 75, not right.

Horse: 180 ÷ 4 = 45, not right.

<u>Cow:  520 ÷ 8 = 65, correct!</u>

Dog: 540 ÷ 6 = 90, not correct.

So as we can see the cow is the right answer.

       

5 0
3 years ago
Read 2 more answers
Each pair of figures is similar find the missing side I need this fast please
garri49 [273]
The answer is 0.2 hope it helps
8 0
3 years ago
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