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Romashka-Z-Leto [24]

2 years ago

8

Tina thinks of two numbers. She says, "My two numbers add up to 12. Three times my first number plus twice my second number is 2

9."

1 answer:

butalik [34]2 years ago

8 0

The first number is 5 and the second number is 7

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The dot plot shows the number of books lent by a school library during a 10-day period.

Katyanochek1 [597]

The mean absolute deviation of the number of books is 1.84

<h3>How to determine the mean absolute deviation?</h3>

The dot plot of the number of books is in the attached figure.

From the figure, we have:

x f

1 1

2 2

3 2

4 3

5 1

6 2

7 3

8 1

Start by calculating the mean using:

$\bar x= \frac{\sum fx}{\sum f}$

So, we have:

$\bar x= \frac{1 * 1 + 2 * 2 + 2 * 3 + 3 * 4 + 1 * 5 + 2 * 6 + 3 *7 + 1 * 8}{1 +2+2+3+1+2+3+1}$

Evaluate the sum and products

$\bar x= \frac{69}{15}$

Divide

$\bar x= 4.6$

The mean absolute deviation is then calculated as:

$|\bar x| = \frac{\sum f|x - \bar x|}{\sum f}$

So, we have:

$|\bar x|= \frac{1 * |1 -4.6|+ 2 * |2 -4.6| + 2 * |3 -4.6|+ 3 * |4 -4.6|+ 1 *| 5 -4.6|+ 2 * |6 -4.6|+ 3 *|7 -4.6|+ 1 * |8-4.6|}{1 +2+2+3+1+2+3+1}$

Evaluate the absolute difference

$|\bar x|= \frac{1 * 3.6+ 2 * 2.6 + 2 * 1.6+ 3 * 0.6+ 1 *0.4+ 2 * 1.4+ 3 *2.4+ 1 * 3.4}{15}$

Evaluate the sum of products

$|\bar x|= \frac{27.6}{15}$

Divide

$|\bar x|= 1.84$

Hence, the mean absolute deviation of the number of books is 1.84

Read more about mean absolute deviation at:

brainly.com/question/3250070

#SPJ1

6 0

2 years ago

Sherwin has 3 cups of grapes he likes to pack 3/4 cup of fruit in his lunch each day how many days can Sherwin pack grapes in hi

Ghella [55]

3/4 goes into 3 how many times?
3/4 times x=3
times both side by 4/3
12/12 times x=12/3
1 times x=4
x=4
answer is 4 days

8 0

2 years ago

Read 2 more answers

if we just passed a sign which says that harrison is 25 miles away and turkey is 40 miles ahead, how far will we have to go to b

Tatiana [17]

Answer:

<em>You will need to go 7.5 miles to be halfway between Harrison and Turkey</em>

Step-by-step explanation:

If you see a sign saying that Harrison is 25 miles away and that Turkey is 40 miles ahead, then the distance from Harrison to Turkey must be 40 miles - 25 miles = 15 miles.

If you drive up to be halfway between Harrison and Turkey, then you need to travel 15/2 = 7.5 miles.

You will need to go 7.5 miles to be halfway between Harrison and Turkey

4 0

2 years ago

(-12)÷6+2 pls help math is hard for me

SVEN [57.7K]

The Answer is -3/2

Below is how I got that answer

(-12) / 6+2

-12/ 8 (Simplify the problem by adding 6 and 2, remove the parenthesis).

-3/2 (Simplify -12/8 by dividing it by 4)

4 0

2 years ago

Simplify the expression.

melamori03 [73]

The answer is C. Hope this helps

7 0

2 years ago

Read 2 more answers