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leva [86]
3 years ago
6

I will give brainliest!!!! Which expressions are equivalent to x+x+x+2? Choose 2 answers: A 3x + 2 (Choice B) B 3 + 2x (Choice C

) C 3(x+2) (Choice D) D 2(x+1)+x (Choice E) E 5x
Mathematics
2 answers:
fredd [130]3 years ago
7 0

Answer:

x+x+x+2

This deals with simplification so it will be B. 3x+2

____ [38]3 years ago
5 0

Answer:

the answer is a and d ! hope it help

Step-by-step explanation:

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Suppose a basketball player has made 231 out of 361 free throws. If the player makes the next 2 free throws, I will pay you $31.
statuscvo [17]

Answer:

The expected value of the proposition is of -0.29.

Step-by-step explanation:

For each free throw, there are only two possible outcomes. Either the player will make it, or he will miss it. The probability of a player making a free throw is independent of any other free throw, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

Suppose a basketball player has made 231 out of 361 free throws.

This means that p = \frac{231}{361} = 0.6399

Probability of the player making the next 2 free throws:

This is P(X = 2) when n = 2. So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 2) = C_{2,2}.(0.6399)^{2}.(0.3601)^{0} = 0.4095

Find the expected value of the proposition:

0.4095 probability of you paying $31(losing $31), which is when the player makes the next 2 free throws.

1 - 0.4059 = 0.5905 probability of you being paid $21(earning $21), which is when the player does not make the next 2 free throws. So

E = -31*0.4095 + 21*0.5905 = -0.29

The expected value of the proposition is of -0.29.

3 0
2 years ago
Can all polynomials be factored?
Lunna [17]

Answer:

yes they can

Step-by-step explanation:

3 0
2 years ago
How do you solve the problem 6-3x=-2x
jolli1 [7]
6-3x=2x

In order to solve these, you first want to get all the variables on one side. So, you add 3x to both sides.

6=x

The answer is x=6

Hope this helps!
3 0
3 years ago
Read 2 more answers
Problemas de proporcion calidad inversa
Nata [24]

Answer:

A)the answer is 21

B)the answer is 22 days

C)the answer is 71 hours

3 0
3 years ago
You need a 35% alcohol solution. On hand, you have a 715 mL of a 20% alcohol mixture. You also have 90% alcohol mixture. How muc
asambeis [7]

Answer:

90% Solution

Step-by-step explanation:

5% of 90 + 90% of x = 75% of (90 + x)

5×90/100 + 90x/100 = 75×90/100 + 75x/100

Or 90x/100 - 75x/100 = 75×90/100 - 5×90/100

Or 15x/100 = 90×70/100

Or X = 420ml

You Will Need ML Of The 90% Solution To Obtain ML Of The Desired 75% Solution.

6 0
2 years ago
Read 2 more answers
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