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3 years ago

9+8=17 what number sentence shows the commutative property of addition

Mathematics

1 answer:

WINSTONCH [101]3 years ago

3 0

The number sentence 9+8=18.

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(72*78*85*90*90)/(68*84*91*108) (There's an easier way than multiplying out the giant products 72 78 85 90 98 and 68 84 91 108)H

Sveta_85 [38]

Cancel common factors. For instance,

$\dfrac{72}{68}=\dfrac{2^3\cdot3^2}{2^2\cdot17}=\dfrac{2\cdot3^2}{17}=\dfrac{18}{17}$

For this expression, we have

$\dfrac{72\cdot78\cdot85\cdot90^2}{68\cdot84\cdot91\cdot108}=\dfrac{2^6\cdot3^7\cdot5^3\cdot13\cdot17}{2^6\cdot3^4\cdot7^2\cdot13\cdot17}=\dfrac{3^3\cdot5^3}{7^2}=\dfrac{15^3}{7^2}=\dfrac{3375}{49}$

5 0

4 years ago

Rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

kykrilka [37]

Answer:

rrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

Step-by-step explanation:

uhh

7 0

3 years ago

Read 2 more answers

The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

7 0

4 years ago

GOD PLZ HELP:: Find x- and y-intercepts. Write ordered pairs representing the points where the line crosses the axes.

Annette [7]

Answer:

x intercept is (3.75, 0) and y intercept is (0, 2.5)

Step-by-step explanation:

4x + 6y - 15 = 0

x int = (3.75, 0)

0*6 = 0

4x - 15 = 0

0 + 15 = 4x = 15

15/4 = 4x

x = 3 3/4 or 3.75

y int = (0, 2.5)

0*4 = 0

6y - 15 = 0

15 = 6y

15/6 = y

y = 2.5

7 0

3 years ago

Subject:Mathematics

nikitadnepr [17]

4 boys had a pulse of 83

7 0

3 years ago

Read 2 more answers