Combine like terms. What is a simpler form of the expression?

2 answers:

7 0

-3(-4y+3)+7y

First multiply -3 by the terms in the parentheses
-3(-4y+3) = 12y -9
Your expression now looks like
12y -9 +7y
Then combine the terms containing the variable y
12y + 7y = 19 y
Your final answer is
19y - 9 (answer choice A)

barxatty [35]4 years ago

6 0

Connexus: Algebraic expressions quiz

1. C, 1/4

2.D, 60

3.C, $10

4.B, IRRATIONAL NUMBERS

5.D,3.31

6.A,7

7.B, DISTRIBUTIVE PROPERTY

8.D,t-40

9. C, 15+8w

10.A, 12F+5R+9B;138

11. plug in the numbers to the equation and you get -55

12. -3(-4y+3)+7y first multiply the -3 on the outside of the parenthesis to the -4y+3, then you get 12y+(-9)+7y add up the ys and you get 19y-9!

-hope this helps all of you guys out! :3

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The number of hours between successive train arrivals at the station is uniformly distributed on (0, 1). Passengers arrive accor

Zepler [3.9K]

Answer:

The value of $E(X) =\frac{7}{2}$ .

The value of $Var (X)= \frac{91}{12}$ .

Step-by-step explanation:

Consider the provided information.

The number of hours between successive train arrivals at the station is uniformly distributed on (0, 1). Passengers arrive according to a Poisson process with rate 7 per hour.

Let X denote the number of people who get on the next train.

Part (A)

Here, X = N(T), N(t) ∼ Poisson(λt), and λ = 7

Therefore, E(N(T)|T) = λT

Now find E(X) as shown below

$E(X) = E(N(T))$