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Ivahew [28]
4 years ago
8

I need Smart people:)

Mathematics
1 answer:
Blababa [14]4 years ago
7 0

Answer:

What? I do not even see what you are trying to get at. I have a masters in math so I could help. Whats the question you are having an issue with ?

Step-by-step explanation:

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Estimate the circumference of a circle that has a diameter of 6 ft.
irga5000 [103]
The formula for circumference is C = 2πr, where r is the radius of the circle. However, the radius is half the diameter, so the circumference could also be calculated using the formula C = πd, where d is the diameter of the circle. π is commonly shortened to 3.14.

If the diameter of the circle is 6 feet, an estimate of the circle's circumference is 6 times 3 feet or 18 feet.

Answer:
18 ft
7 0
4 years ago
Jerry has taken a random sample of students and determined the number of electives that each student in his sample took last yea
Sunny_sXe [5.5K]
<span>The sample proportion of the the students that took fewer than the mean number of electives is given by the number of people who took less that the mean number of electives (i.e. 7.63) divided by the total number of students in the sample (i.e. 19). The total number of people who took less than 7.63 electives is 10. Therefore, the required sample proportion is 10 / 19. </span>
8 0
3 years ago
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two points on the line are (-10,1) and (5,-5).if the coordinate of another point on the line is -3,what is the x-coordinate?​
zlopas [31]

Answer:

x-coordinate = 0

Step-by-step explanation:

(-10,1) , (5,-5)

m = (y₂ - y₁)/(x₂ - x₁) = ( -5 - 1 ) / ( 5 - [-10] )

   = -6 / ( 5 + 10)

    = -6/15 = -2/5

y - y₁  = m (x - x₁)

y - 1 = (-2/5) ( x - [-10] )

y - 1 = (-2/5) ( x + 10 )

5 * (y -1)  = -2 (x + 10)

5y - 5 = -2x -20

2x + 20 + 5y  -5 = 0

2x + 5y + 15 = 0

Another point (a, -3) in on this line

2 * a + 5 * (-3) = -15

          2a -15    = -15

                  2a  = -15 +15

                 2a =  0

                    a = 0

x-coordinate = 0

6 0
3 years ago
You are choosing between two different cell phone plans. the first plan charges a rate of 24 cents per minute. the second plan c
Bogdan [553]

x is the number of minutes per month. The plans are equal when


.24 x = 44.95 + .10 x


.14 x = 44.95


x = 44.95/.14 = 321 \frac 1 {14} \textrm{ minutes}


Assuming they round to the nearest minute, 322 minutes per month or more for the second plan to be preferable.


5 0
3 years ago
If x varies directly to y, and x=3 when y=18, what is the constant of variation?
Irina-Kira [14]
Your answer is going to be : 6 cause 6 x 3 = 18
8 0
3 years ago
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