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3 years ago

the mean of 10 students is 16 . When a student is added, the mean becomes 18. Find the age of the student added

Mathematics

1 answer:

MakcuM [25]3 years ago

5 0

Answer:

Step-by-step explanation:

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In a study of 30 high school students, researchers found a high correlation, 0.93, between amount of exercise and weight lost. W

zloy xaker [14]

Answer:

Option A is true

The researchers proved that exercise causes weight loss only for high school students.

Step-by-step explanation:

We are told that the researchers found a high correlation, 0.93, between amount of exercise and weight lost.

Now, looking at each of the options;

- A is True because due to the high correlation, the research proves that exercise causes weight loss but only for high school students.

- B is not true because we are told the correlation is very high at 0.93. Thus, it is untrue that there is no proven causation.

-C is not true because there's no where that the researchers have completely proved that exercise causes weight loss generally. It is only peculiar to the high school students studied.

-D is not true because the 93% is just a correlation and not a percentage of those who lost weight

8 0

3 years ago

Which is the simplified form of (9c^-9)-3

Orlov [11]

3[3c^(-9)-1]

hope this helps

5 0

3 years ago

A jogger goes 1.5km west and then turns south.If the jogger finishes 1.7 km from the starting point,how far south did the jogger

kakasveta [241]

Hello!

You can use the Pythagorean Theorem to solve this

$a^{2} + b^{2} = c^{2}$

c is the hypotenuse
a and b are the legs

Put in the values you know

$1.5^{2} + b^{2} = 1.7^{2}$

Square the numbers

$2.25+ b^{2} =2.89$

Subtract 2.25 from both sides

$b^{2} =0.64$

Take the square root of both sides

b = 0.8

The answer is 0.8km

Hope this helps!

6 0

3 years ago

3m + 9 - 9m = 2m + 25 whats m

lozanna [386]

Answer:

Step-by-step explanation:

3m + 9 -9m = 2m + 25

3m + 9 = 11m + 25

9 = 8m + 25

16/2 = 8m/2

M = 8

3 0

3 years ago

Read 2 more answers

What's 5.78,-5 7/8,-5.9 from least to greatest?

blagie [28]

-5.9, -5 7/8, 5.78 because negative is less than zero and 7/8= .850 :)

3 0

3 years ago

the mean of 10 students is 16 . When a student is added, the mean becomes 18. Find the age of the student added​

the mean of 10 students is 16 . When a student is added, the mean becomes 18. Find the age of the student added