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sergeinik [125]

3 years ago

7

Spencer drink 2/3 liter of water Monday before going jogging he drink 5/7 liter of water after his jog how much water did Spence

r drink all together?

1 answer:

Alenkasestr [34]3 years ago

4 0

Answer:

1 8/21 liters

Step-by-step explanation:

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The ages of 11 students enrolled in an on-line macroeconomics course are given in the following steam-and-leaf display:

blsea [12.9K]

Answer:

The standard deviation of the age distribution is 6.2899 years.

Step-by-step explanation:

The formula to compute the standard deviation is:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

The data provided is:

X = {19, 19, 21, 25, 25, 28, 29, 30, 31, 32, 40}

Compute the mean of the data as follows:

$\bar x=\frac{1}{n}\sum\limits^{n}_{i=1}{x_{i}}$

$=\frac{1}{11}\times [19+19+21+...+40]\\\\=\frac{299}{11}\\\\=27.182$

Compute the standard deviation as follows:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

$=\sqrt{\frac{1}{11-1}\times [(19-27.182)^{2}+(19-27.182)^{2}+...+(40-27.182)^{2}]}}\\\\=\sqrt{\frac{395.6364}{10}}\\\\=6.28996\\\\\approx 6.2899$

Thus, the standard deviation of the age distribution is 6.2899 years.

7 0

3 years ago

9/10 divide by -3/15 as a mixed number

Ket [755]

-4 1/2 is the answer.

8 0

3 years ago

Read 2 more answers

Use substitution to solve the linear system of equations.

zzz [600]

<span>5x - y = 15 (1)
-10x+2y=-30 (2)

multiply (1) by 2

10x - 2y = 30
</span>-10x + 2y = -30 (2)
<span>---------------------------add
0 = 0

answer
</span><span>infinitely many solutions</span><span>

</span>

5 0

3 years ago

Solve the equation for x.<br> X +9= -11

Vera_Pavlovna [14]

Answer:

x=-20

Step-by-step explanation:

x+9=-11

Subtract 9 from both sides. (-11-9=-20)

x=-20

7 0

3 years ago

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What is an explicit rule for the sequence 9, 14, 19, 24

Komok [63]

Answer: an arithmetic sequence

Step-by-step explanation:

3 0

3 years ago