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3 years ago

Solve this for x. I have had 3 tries and can’t get the right answer.

Mathematics

2 answers:

lawyer [7]3 years ago

6 0

4x-1<-13

Add 1 to both sides.

4x<-12

Divide by 4.

x<-3

Tanya [424]3 years ago

4 0

Let's do both. For the first one, we can add 1 to both sides using the property of equality, and get 4x < -12. Then, we divide by 4, getting us x<-3. For the second, we subtract 3 from both sides to get -2x < 4. Then, we divide by -2 on both sides, but when we divide by a negative we have to switch the sign. So, we get x > -2. Hope this helps.

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3 years ago

You take a quiz with 6 multiple choice questions. After you studied your estimated that you would have about an 80 % chance of g

Arada [10]

Answer:

1.15%

Step-by-step explanation:

To get the probability of m independent events you multiply the individual probability of each event. In this case we have m independent events, each one with the same probability, therefore:

$p^{m}$

$0.8^{20} = 1.15\%$

This is a particlar scenario of binomial distribution problem. So the binomial distribution questions are about the number of success of m independent events, where every individual event has the same p probability. In the question we have 20 events and each event has a probability of 80%. The binomial distribution formula is:

$\binom{n}{k} * p^{k} * (1-p)^{n-k}$

n is the number of events

k is the number of success

p is the probability of each individual event

$\binom{n}{k}$ is the binomial coefficient

the binomial coefficient allows to find the subsets of k elements in a set of n elements. In this case there is only one subset possible since the only way to get 20 of 20 correct questions is to getting right all questions (for getting 19 of 20 questions there are many ways, for example getting the first question wrong and all the other questions right, or getting second questions wrong and all the other questions right, etc).

$\binom{n}{k} = \frac{n!}{k!(n-k)!}$

therefore, for this questions we have:

$\frac{20!}{20!(20-20)!} * 0.8^{20} * (1-0.8)^{0} = 1.15\%$

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3 years ago

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Read 2 more answers

Please! I need this answeredd!!!!

Rashid [163]

The Traingle XYZ and ACB are similar triangles. tanX = tanA = 5 over 2 and 5 tenths,

AC = 2 * XY; CB = 2 * YZ

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more variables and numbers.

Triangle XYZ was dilated by a scale factor of 2 to create triangle ACB, hence XYZ and ACB are similar triangles.

Angles Y and C both measure 90 degrees, and angles A and X are congruent. Hence:

tanX = tanA = 5 over 2 and 5 tenths

AC = 2 * XY; CB = 2 * YZ

Find out more on equations at:

brainly.com/question/2972832

#SPJ1

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