Ask question

Ask question

All categories

2 years ago

8

What is 2+2 guys i don’t know and my math teacher asked me to tell her next lesson

1 answer:

JulsSmile [24]2 years ago

7 0

Answer:4

Step-by-step explanation:

2+2=4

You might be interested in

The data given below contain the state cigarette taxâ€‹ (in $) for all 20 regions of a country.

g100num [7]

Answer:

(a) $\bar x= 1.583$ -- Population Mean

(b) $s = 1.032$ --- Population standard deviation

(c) See Explanation

Step-by-step explanation:

Given:

Cigarette tax for 20 regions

Solving (a): The population mean

This is calculated as:

$\bar x = \frac{\sum x}{n}$

$\sum x = 1.36 + 1.70 + 2.50 + 0.45 + 1.18 + 0.64 + 3.46 + 0.57 + 2.00 + 0.80 + 1.60 +0.98 + 0.36 + 2.24 + 4.35 + 0.62 + 2.70 + 1.78 + 1.53 + 0.84$

$\sum x = 31.66$

$n = 20$

So, we have:

$\bar x= \frac{31.66}{20}$

$\bar x= 1.583$

Solving (b): The population standard deviation

This is calculated as:

$s = \sqrt{\frac{\sum( x - \bar x)^2}{n}$

$\sum (x -\bar x)^2 = (1.36 - 1.583)^2 + (1.70 - 1.583)^2+ (2.50 - 1.583)^2+ (0.45 - 1.583)^2+ (1.18 - 1.583)^2+ (0.64 - 1.583)^2+ (3.46 - 1.583)^2+ (0.57 - 1.583)^2+ (2.00 - 1.583)^2+ (0.80 - 1.583)^2+ (1.60 - 1.583)^2+(0.98 - 1.583)^2+ (0.36 - 1.583)^2+ (2.24 - 1.583)^2+ (4.35 - 1.583)^2+ (0.62 - 1.583)^2+ (2.70 - 1.583)^2+ (1.78 - 1.583)^2+ (1.53 - 1.583)^2+ (0.84- 1.583)^2$

$\sum (x -\bar x)^2 = 21.29222$

So:

$s = \sqrt{\frac{21.2922}{20}$

$s = \sqrt{1.06461}$

$s = 1.032$

Solving (c):

Population mean tells the average amount while the standard deviation represents the spread from the calculated mean

Option (4) is correct

6 0

2 years ago

Help I will be marking brainliest!!!

guajiro [1.7K]

<h3>AG = 27 and VA = 24. What is TO? </h3>

A. 45

B. 43

<h3>C. 36</h3>

D. 90

#CarryOnLearning.

3 0

2 years ago

Problem 2 Example 2: Bruno spends $23 at the arcade. He purchased two drinks and spent $17 on games. What was the cost of each d

stiks02 [169]

Answer:

$3

Step-by-step explanation:

23-17=6

6/2=3

To check:

6+17=23

3 0

3 years ago

Read 2 more answers

Find the sum of <br> 2x^2- 8x– 6 and 9x^2-8

Rama09 [41]

Answer:

11x^2-8x-14

Step-by-step explanation:

(2x^2- 8x– 6)+(9x^2-8) = 11x^2-8x-14

5 0

3 years ago

Read 2 more answers

Zoey is designing a jewelry box in the shape of a rectangular prism. The base is 6 inches by 5 inches and the height is 4 inches

makvit [3.9K]

Answer:

148 square inches

Step-by-step explanation:

Step 1: finding the area of the base (upper base plus lower base)

2( L x W).

2 (6in. x 5in.)

2( 30 square inches.)

60 square inches

Step 2: finding the area of first 2 sides

2 ( l x w)

2 ( 5in x 4in)

2 ( 20 square inches.)

40 square inches

step 3: finding the area of the last 2 sides

2(lxw)

2(4in.x 6in.)

2(24 square inches.)

48 square inches

step 4: combine all the answers.

60 square inches. + 40 square inches. + 48 square inches = 148 square inches

7 0

3 years ago

Read 2 more answers