Definition of Identity property, Association property and communicative property please answer!

Which rational number equals 0.4?<br> A. 2 over10<br> B. 2 over 9<br> C.4 over 10<br> D.4 over 9

Allisa [31]

Answer:

C. 4/10

Step-by-step explanation:

a. 2/10 = 0.2

b. 2/9=0.2222...

c. 4/10=0.4

D. 4/9=0.4444...

3 0

3 years ago

Read 2 more answers

Suppose that the probability that a person books an airline ticket using an online travel website is 0.72. Consider a sample of

ExtremeBDS [4]

Answer:

0.183

Step-by-step explanation:

This is a question on Binomial Probability

Formula =nCx × p^x × q^n - x

p = 0.72

q = 1 - p

= 1 - 0.72

= 0.28

x = number of successes = 9

n = 10

The probability that at least nine out of ten people used an online travel website when they booked their airline ticket

At least 9 out of 10 means

x ≥ 9 = x = 9 and x = 10

Hence,

P(x ≥ 9) = 10C9 × (0.72^9 × 0.28^10 - 9) + 10C10 × ( 0.72^10 × 0.28^10 - 10)

P(x ≥ 9) = 0.14559635388 + 0.0374390623

= 0.18303541631

≈ 0.183

3 0

3 years ago

How can you tell if a set of bivariate data shows a linear relationship?

stira [4]

Make a scatterplot of the data. Once finished, look at the scatterplot to determine if the data taken holistically appears to be a close to the shape of a line.

5 0

3 years ago

Plz help, I don't get it

amm1812

Step-by-step explanation:

$(a+b)^{2} =a^{2} +2ab+b^{2}$

e.g.

$(x+9)^{2} =x^2+2(x)(9)+81$

$(x+9)^{2} =x^2+18x+81$

8 0

3 years ago

A librarian is expanding some sections of the city library. He buys book at a special price from a dealer who charges one price

stiks02 [169]

Answer:

The special price of 1 hardcover book = $13

The special price of 1 paperback book = $6

Step-by-step explanation:

Here, let us assume the special price of 1 hardcover book = $ m

and the the special price of 1 paperback book = $ n

Now, the price of 12 hardcover books = 12 x ( Price of 1 hardcover) = 12 m

and the price of 73 paperback books = 73 x ( Price of 1 paperback) = 73 n

Also, The price paid for 12 hardcover and 73 paperback books is $594

⇒ 12 m + 73 n = 594 ....... (1)

Similarly:

The price of 11 hardcover books = 11 x ( Price of 1 hardcover) = 11 m

The price of 87 paperback books = 87 x ( Price of 1 paperback) = 87 n

Also, The price paid for 11 hardcover and 87 paperback books is $665.

⇒ 11 m + 87 n = 665 ....... (2)

Now, solving both equation for the value of m and n , we get:

12 m + 73 n = 594 x 11

11 m + 87 n = 665 x (-12)

we get: 132 m + 803 n = 6534

- 132 m - 1044 n = - 7980

adding both equation, we get:

132 m + 803 n - 132 m - 1044 n = - 7980 + 6534

or, - 241 n = - 1446

or, n = 1446/241 = 6, or n = 6

Now, Substituting n = 6 in 12 m + 73 n = 594 ,

we get: 12 m + 73 ( 6) = 594, m = 13

Hence, The special price of 1 hardcover book = $13

and The special price of 1 paperback book = $6

7 0

3 years ago

Definition of Identity property, Association property and communicative property please answer!​

Definition of Identity property, Association property and communicative property please answer!