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3 years ago

Witch number line represents the solution for the inequality 3x<-9

Mathematics

2 answers:

jok3333 [9.3K]3 years ago

5 0

Answer:

Step-by-step explanation:

3x < -9

Divide both sides by 3

x < - 3

x = {........-5, - 4 ,}

PtichkaEL [24]3 years ago

3 0

Answer:

x < -3

Step-by-step explanation:

3x<-9

Divide each side by 3

3x/3 <-9/3

x < -3

Open circle at -3 line going to the left

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On a number line, show all values of x that have the absolute value less than 3

Marysya12 [62]

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3 years ago

Your test scores in one class are 79 and 85. What possible scores can you earn on your next test to have a test average between

mestny [16]

Multiply the average by the number of tests to find the total of the scores:

82 x 3 = 246

88 x 3 = 264

The total of the three tests would need to be between 246 and 264

The total of the first two tests is 79 + 85 = 164

Subtract the total of the first two from the totals above:

246 - 164 = 82

264 - 164 = 100

The score of the third test needs to be between 82 and 100

3 0

3 years ago

Read 2 more answers

Solve for missing angle, show your work : HELP!

Serga [27]

Answer:

105

Step-by-step explanation:

The interior angles must sum to 360

360-91+82-82 = 105

7 0

3 years ago

Can anyone help me start this? Its about Factoring Trinomials

alexgriva [62]

For these problems, there's a rule. For example, in the first problem, the answer is going to be (t+?)(t+?), and the ?s are going to multiply to get the constant and add to get the coefficient in the second term.

Do you need answers&work?

7 0

4 years ago

What is the probability that the mean duration of the 24 rowers with idna exceeds 63 minutes?

statuscvo [17]

Answer:

Step-by-step explanation:

Given that: Training-session duration of female rowers with normal iron status is Normally distributed, with mean 69 minutes and standard deviation 18minutes.

Solution:

z score shows the relationship between sample means. The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by the formula:

$z=\frac{x-\mu}{\sigma}\\\\for\ sample(n):\\\\z=\frac{x-\mu}{\sigma/\sqrt{n} } \\\\where\ \mu=mean,\sigma=standard\ deviation,x=raw\ score$

Given that μ = 69 minutes, σ = 18 minutes, n = 24

For x > 63 minutes:

$z=\frac{x-\mu}{\sigma / \sqrt{n} } =\frac{63-69}{18/\sqrt{24} }=-1.63$

From the distribution table, P(x > 63) = P(z > -1.63) = 1 - P(z < 1.63) = 1 - 0.0516 = 0.9484

7 0

3 years ago