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3 years ago

This equation has one solution. 5(x - 1) + 3x = 7(x + 1) VA What is the solution?

Mathematics

2 answers:

zubka84 [21]3 years ago

8 0

I think the answer is 12

dlinn [17]3 years ago

6 0

The solution is x=12

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3 3/4 ÷5 5/8 Please help

katovenus [111]

Answer: 2/3 or .667

Step-by-step explanation:

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2 years ago

You have 32 foot long fence there are 4 equal sections you paint 1/3 of on section what fraction of the fence did you paint

zheka24 [161]

2/32. Divide 32 by 4 to equal 8, and then divide 8 by 3 because that’s how much you painted, a third of a fourth

8 0

3 years ago

Please please help me with this thank you

Alecsey [184]

The answer if i understand correctly is 17x7x24=2,856 square inch
or thats what the calculator told me

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3 years ago

Discrete R.V. Assume a student shows up for EGR 280 completely unprepared and the instructor gives a pop quiz. Assume there are

Tom [10]

Answer:

a) p=0.2

b) probability of passing is 0.01696

c) The expected value of correct questions is 1.2

Step-by-step explanation:

a) Since each question has 5 options, all of them equally likely, and only one correct answer, then the probability of having a correct answer is 1/5 = 0.2.

b) Let X be the number of correct answers. We will model this situation by considering X as a binomial random variable with a success probability of p=0.2 and having n=6 samples. We have the following for k=0,1,2,3,4,5,6

$P(X=k) = \binom{n}{k}p^{k}(1-p)^{n-k} = \binom{6}{k}0.2^{k}(0.8)^{6-k}$ .

Recall that $\binom{n}{k}= \frac{n!}{k!(n-k)!}$ In this case, the student passes if X is at least four correct questions, then

$P(X\geq 4) = P(X=4)+P(X=5)+P(X=6)=\binom{6}{4}0.2^{4}(0.8)^{6-4}+\binom{6}{5}0.2^{5}(0.8)^{6-5}+\binom{6}{6}0.2^{6}(0.8)^{6-6}= 0.01696$

c)The expected value of a binomial random variable with parameters n and p is $E[X] = np$ . IN our case, n=6 and p =0.2. Then the expected value of correct answers is $6\cdot 0.2 = 1.2$

5 0

4 years ago

What is 0.0003124 in scientific notation?

Shalnov [3]

3.124 * 10^-4

since your decimal is coming forward you need the exponent to be negative

3 0

3 years ago

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