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bazaltina [42]
3 years ago
10

KELLY HAS 4 TIMES AS MANY SONGS ON HER MUSIC PLAYER AS LOU. TIFFANY HAS 6 TIMES AS MANY SONGS ON HER MUSIC PLAYER AS LOU. ALTOGE

THER, THEY HAVE 682 SONGS ON THEIR MUSIC PLAYERS. HOW MANY SONGS DOES KELLY HAVE?
Mathematics
1 answer:
Fittoniya [83]3 years ago
7 0
682 divide by 4 = 170.5
is that right no or yes
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A sample of 10 adult elephants had an average weight of 12,556 pounds. The standard deviation
kirill [66]

Answer:

The 99% confidence interval of the population mean for the weights of adult elephants is between 12,475 pounds and 12,637 pounds.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 10 - 1 = 9

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 9 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 3.25

The margin of error is:

M = T*s = 3.25*25 = 81

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 12,556 - 81 = 12,475 pounds

The upper end of the interval is the sample mean added to M. So it is 12,556 + 81 = 12,637 pounds.

The 99% confidence interval of the population mean for the weights of adult elephants is between 12,475 pounds and 12,637 pounds.

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3 years ago
Use the equation y=3x+1 to complete the table and solve for the missing y values. Identify the ordered pairs from the table. Sel
Serjik [45]

Answer:

(-2, -5)

(-1, -2)

(0, 1)

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Step-by-step explanation:

Substitute x with each number and solve equation.

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Answer:

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The mistake is “there are”
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Determine the standard form of the equation of the line that passes through (-2, 0) and (-8, 5).
Vladimir79 [104]

Answer:

5x + 6y = -10

Step-by-step explanation:

(-2, 0) and (-8, 5)

m = (y₂ - y₁) /  (x₂ - x₁)

m = (5 - 0) / (-8 -(-2)

m = 5 / (-8+2)

m = -5/6

y = mx + b

(-8, 5)

5 = -5/6(-8) + b

5 = 40/6 + b

b = 5 - 40/6

b = -5/3

y = mx + b

y = -5/6x - 5/3           *6

6y = -5x -5(2)

6y = -5x - 10

5x + 6y = -10

8 0
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