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4 years ago

Why is there not an associative property of subtraction?

1 answer:

6 0

Answer: Order of operations matter for subtraction and division.

Explanation:

Example of associate property:
(2-3)-4 = -5 ≠ 1 = 2-(3-4))

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*BRIANLIEST WILL BE GIVEN*(08.06 LC)

Ganezh [65]

Adding the equations to eliminate p would be the correct step because when you add the equations together, the variable p would cancel out and be eliminated leaving you with 2w=35 you can then solve for the value of w which you can then input to find the value of p, allowing you to solve for the values of both p and w.

6 0

3 years ago

john is moving up to the attic and wants to paint one wall blue the wall is a triangle with a base of 21 feet and height of 8 fe

jarptica [38.1K]

168 is the area, because if you want to find the area of something, you could multiply the numbers, to find the area.

Hope this helps :)

4 0

3 years ago

The results of Accounting Principals’ latest Workonomix survey indicate the average American worker spends $1092 on coffee annua

Nataly_w [17]

Answer:

Group 18-34 years old

$\bar x = 1041.625 \\ s^2=485301 \\ s=696.635$

Group 35-44 years old

$\bar x = 1359.5 \\ s^2=178548 \\ s=422.549$

Group 45 and older

$\bar x = 1414.375 \\ s^2=18292.27 \\ s=135.248$

According to the sample there is 9.04% probability that a person between 18 and 34 consume less than the average, 47.74% probability that a person between 35 and 44 consume more than the average and 50% probability that a person older than 45 consume more than the average.

Step-by-step explanation:

The mean for each sample is

$\bar x=\frac{\sum_{k=1}^{10}x_k}{10}$

where the $x_k$ are the data corresponding to each group

The variance is

$s^2=\frac{\sum_{k=1}^{10}(\bar x-x_k)^2}{9}$

and the standard deviation is s, the square root of the variance.

Group 18-34 years old

$\bar x = 1041.625 \\ s^2=485301 \\ s=696.635$

Group 35-44 years old

$\bar x = 1359.5 \\ s^2=178548 \\ s=422.549$

Group 45 and older

$\bar x = 1414.375 \\ s^2=18292.27 \\ s=135.248$

Let's compare these averages against the general media established of $1,092 by using the corresponding z-scores

$z=\frac{\bar x-\mu}{s/\sqrt{n}}$

where

$\bar x$ = mean of the sample

$\mu$ = established average

s = standard deviation of the sample

n = size of the sample

z-score of Group 18-34 years old

$z=\frac{1041.625-1092}{696.635/\sqrt{10}}=-0.2286$

The area under the normal curve N(0;1) between -0.2286 and 0 is 0.0904. So according to the sample there is 9.04% probability that a person between 18 and 34 consume less than the average.

z-score of Group 35-44 years old

$z=\frac{1359-1092}{422.5491/\sqrt{10}}=2.0019$

The area under the normal curve N(0;1) between 0 and 2.0019 is 0.4774. So according to the sample there is 47.74% probability that a person between 35 and 44 consume more than the average.

z-score of Group 45 and older

$z=\frac{1414.375-1092}{135.2489/\sqrt{10}}=7.5375$

The area under the normal curve N(0;1) between 0 and 7.5375 is 0.5. So according to the sample there is 50% probability that a person older than 45 consume more than the average.

3 0

4 years ago

8x⁶y⁵- 3x⁸y³ find the GCF of the given polynomial

pav-90 [236]

Answer:

Check photo

Step-by-step explanation:

6 0

3 years ago

The total cost 95 pens and 89 notebooks is RS 7434.The total cost of 1 pen and 1 notebook is 81.What the cost of 1 notebook?

Alex

Answer:

The cost of 1 note book = Rs 43.5

Step-by-step explanation:

Given in question as :

95 pens (P) + 89 notebook (N) total cost = Rs 7434

1 pen (P) + 1 (N) total cost = Rs 81

So, from above equation

95 pens (P) + 89 notebook (N) total cost = Rs 7434

1 × 95 pen (P) + 1× 95 notebook (N) total cost = Rs 81 × 95

Or, (95 pens (P) + 95 notebook (N) ) - (95 pens (P) + 89 notebook (N) ) = (7695 - 7434)

Or , 6 N = Rs 261

Or, N = $\frac{261}{6}$ = Rs 43.5

Hence the cost of 1 notebook is Rs 43.5 Answer

4 0

3 years ago