Solve for X Distribution

2(x + 3) = 8

• 2.5

• 1

• 7

• 5.5

Tags

CCSS.7.EE.B.4A

A marketing survey compiled data on the number of cars in households.  If X = the number of cars in a randomly selected household, and we omit the rare cases of more than 5 cars, then X has the following probability distribution: 
X           0          1          2          3           4           5    
P(X)   0.24    0.37    0.20    0.11    0.05     0.03
What is the probability that a randomly chosen household has at least two cars?

• 0.20

• 0.29

• 0.39

• 0.61

The table represents the probability of guessing correct on a 5 question true-false quiz.  Find the probability for at least 4 questions correct.

• .03125

• .15625

• .3125

• .1875

A discrete random variable X has the probability distributions shown in the table. Find the value of k. (Remember that a valid probability distribution must add up to 1)

• 1/3

• 7/12

• 1/12

• 1/4

The following table represents the probability distribution X, the employment status of adults in a city. What is the probability that the adults isn't retired?

Solve for x using distribution:

–2(x+5) = 8

Tags

CCSS.7.EE.B.4A

Solve for x. Distribute then Combine Like Terms: 3(2x – 5) – 4x = –19

• x = –2

• x = 2

• x = 10

• x = –11

Tags

CCSS.8.EE.C.7B

Solve for x. Distribute then Combine Like Terms:

–4 (3x – 7) = 4

Tags

CCSS.8.EE.C.7B

When distributing a number through ( ), it needs to multiply to __________________

• just the first term inside the ( )

• just the last term inside the ( )

• every term inside the ( )

• any two terms inside the ( )

Tags

CCSS.7.EE.A.1

Solve the equation below:

3 (2x + 3) = 21

Tags

CCSS.7.EE.B.4A