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3 years ago

What are equivalent to2x+4

Mathematics

1 answer:

lakkis [162]3 years ago

4 0

Answer:

3x + 3, 4x+2, 5x+1

Step-by-step explanation:

what are equivalent to2x+4

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A national newspaper reported that the state with the longest mean life span is Hawaii, where the population mean life span is 7

Alinara [238K]

Answer:

Mean = 71.4 years

Standard Deviation = 20.64 years

Step-by-step explanation:

We are given the following data set:

72, 68, 81, 93, 56, 19, 78, 94, 83, 84, 77, 69, 85, 97, 75, 71, 86, 47, 66, 27

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{1428}{20} = 71.4$

Sum of squares of differences =

0.36 + 11.56 + 92.16 + 466.56 + 237.16 + 2745.76 + 43.56 + 510.76 + 134.56 + 158.76 + 31.36 + 5.76, 184.96 + 655.36 + 12.96 + 0.16 + 213.16 + 595.36 + 29.16 + 1971.36 = 8100.8

$S.D = \sqrt{\displaystyle\frac{8100.8}{19}} = 20.64$

Mean = 71.4 years

Standard Deviation = 20.64 years

6 0

3 years ago

What is true about multiples of 6?

Ivan

Answer:

Each multiple will always be divisible by 3

Step-by-step explanation:

3 0

3 years ago

How do you measure the diameter of four steel rods and than compare the measurement? Thank you!

enyata [817]

The answer is B. 0.25 inch. Lets multiply all of them by the same factor. Since A. and B. have 3 decimals, lets divide all numbers by 1000: A. 0.026 * 1000 = 26, B. 0.25 * 1000 = 250, C. 0.24 * 1000 = 240, D. 0.025 * 1000 = 25. So, by comparing the whole numbers, it can be concluded that the biggest steel rod is B. 0.25 inch.

7 0

3 years ago

Find the digit that makes _2440 divisible by 9.

maks197457 [2]

divide using long division 271 r 1

dividing normally

exact form 2440/9

decimal form:27.1

mixed number form:

271 1/9

8 0

3 years ago

Finc the sum of the following: -b-4a, 7b-6a

Gemiola [76]

S ok by brother your we’ll

6 0

3 years ago

Read 2 more answers