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Furkat [3]
4 years ago
9

What property is this? (2*45)*9=2*(45*9)

Mathematics
2 answers:
ad-work [718]4 years ago
6 0
Multiplication property of association
Nostrana [21]4 years ago
5 0

Answer:

Multiplication property of association

Step-by-step explanation:

that what it is! hope it help!!!

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What is the expected number of pets for a student in his class?
lana [24]

Answer:

A) about 1 pet

Step-by-step explanation:

Total the products of number of pets and their probability.

... 0×0.4 +1×0.3 +2×0.25 +3×0.05

... = 0 +0.3 +0.5 +0.15 = 0.95 . . . . . about 1

___

We assume that "3 or more" will be closer to 3 than to 15, a number that would raise the expected value to more than 1.5.

7 0
4 years ago
Help is needed please!!! Thanks Find the number of pairs of integers (x,y) with 0 1-(5/y)
Olenka [21]

Answer:

Técnicas orales y de cálculo mental de multiplicación y división entera . ... conjunto de múltiplos de 10 es un subconjunto de los números pares. Si ... La clase vacía ∅ se representa por la notación 0, la clase unitaria por 1, la clase binaria por 2, etc. En ... 5 x (5 x (5 x (5 + 4) + 3 ) + 2) + 1 ; x significa el signo de multiplicar. 8.

Step-by-step explanation:

Técnicas orales y de cálculo mental de multiplicación y división entera . ... conjunto de múltiplos de 10 es un subconjunto de los números pares. Si ... La clase vacía ∅ se representa por la notación 0, la clase unitaria por 1, la clase binaria por 2, etc. En ... 5 x (5 x (5 x (5 + 4) + 3 ) + 2) + 1 ; x significa el signo de multiplicar. 8.

4 0
3 years ago
The sum of deviations of n observations about 25 is 25 and the sum of deviations of the same n observations about 35 is −25. The
OLga [1]

Answer:

<h2>30 </h2>

Step-by-step explanation:

<h2>please refer to the attachment above</h2>

4 0
3 years ago
10. (07.07 LC)
Serhud [2]

Answer:

81

Step-by-step explanation:

(9x - 4)(9x + 4) = ax² - b

81x² - 36x + 36x - 16

= 81x² - 16

=> a = 81

6 0
3 years ago
4. A survey found that of 26 food restaurants, 13 were pizza parlours, 9 did not sell alcohol, and 7 were pizza
ICE Princess25 [194]

Answer: 16/13

Step-by-step explanation:

Facts:  

Total: 26 restaurants

Pizza parlors: 13

9/13 do not sell alcohol

7/13 do not sell alcohol

Total probability (not serving alcohol): 16/13

8 0
2 years ago
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