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3 years ago

Select the property that allows the statement (a + b) + c to be written as c + (a + b).

2 answers:

7 0

Commutative property allows you to change the order of an expression. Therefore, this expression is an example of commutative property.

morpeh [17]3 years ago

5 0

The associative property of addition.

It states that you can regroup a, b and c in any way and still get the same answer.

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In point estimation a. data from the population is used to estimate the population parameter b. data from the sample is used to

icang [17]

Answer:

Option B) data from the sample is used to estimate the population parameter

Step-by-step explanation:

Point estimation:

Its is the process of getting a point estimate from a sample that describes a population parameter in the best way.
We calculate the unknown population parameter with the help of a sample drawn from the population.
It is similar to interval estimation.
In interval estimation we obtain an interval in which the population parameter may lie but in point estimation we obtain a single value which is the best approximation of population parameter.

Thus, the correct answer is

Option B) data from the sample is used to estimate the population parameter

4 0

3 years ago

Bob discovers a box with 30 identical, used, rechargeable batteries in his attic. Suppose each of them is equally likely have so

lukranit [14]

The question is incomplete! The complete question along with answer and explanation is provided below.

Question:

Bob discovers a box with 30 identical, used, rechargeable batteries in his attic.

Suppose each of them is equally likely have some charge in it, or to have run out of charge. What is the probability that:

a) All of them are out of charge?

b) 20% of them are out of charge?

Answer:

Part A) P = 9.31x10⁻¹⁰

Part B) P = 5.529x10⁻⁴

Step-by-step explanation:

It is given that probability of success or failure is 50%

Let

failure = battery is out of charge

success = battery is not out of charge

Psuccess = p = 0.50

Pfailure = q = 1 - Psuccess = 0.50

Part A) All of them are out of charge?

The probability can be found by using binomial distribution formula

P = nCr (p^r) (q^n-r)

where r is the number of success

n = 30, r = 30 and n - r = 30 - 30 = 0

P = ₃₀C₃₀(0.50)³⁰(0.50)⁰

P = 9.31x10⁻¹⁰

Part B) 20% of them are out of charge?

Out of charge batteries = 0.20*30 = 6

n = 30, r = 24 and n - r = 30 - 24 = 6

P =₃₀C₆(0.50)²⁴(0.50)⁶

P = 5.529x10⁻⁴

5 0

3 years ago

The equation of a line is x+4y=15

Pani-rosa [81]

The y-intercept of the line is the value of "y" when x=0
Therefore:
if x=0
0+4y=15
4y=15
y=15/4

Answer: A. 15/4

8 0

3 years ago

Read 2 more answers

I need the corresponding letters on the equation. A= B= C= D= E= F= G=

REY [17]

Answer:

A = 3

B = 1

C = 2

D = 10

E = 2

F = Not listed

G = 1

Step-by-step explanation:

$\sqrt[3]{270x^5y^7} =\sqrt[3]{27*10x^5y^7}=3xy^2\sqrt[3]{10x^2y}$

8 0

3 years ago

Pleeeeeezzzzzzzz answer this

zimovet [89]

Answer:49 degrees

Step-by-step explanation: because all the opposite angles are same and alternative angles makes it same too plz mark me brainiest

3 0

3 years ago