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2 years ago

Answer plz this is on khan academy

Mathematics

1 answer:

Vera_Pavlovna [14]2 years ago

7 0

Answer:

Step-by-step explanation:

This graph represents the inequality x < 2. you may be confused as to why the answer is not x ≤ 2, but the circle at the start of the line is not shaded in. This tells us that an answer to this inequality cannot be x

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Solve for the equation, show all your work. This is an absolute value equation. You need to show both equations and the work for

VMariaS [17]

Answer:

$x=-1$ or $7$

Step-by-step explanation:

We use casework on when $3x-9=12$ and when $3x-9=-12$ .

For the first case, $3x-9=12$ , we add 9 to both sides to get

$3x=21$ .

Dividing both sides by 3 gives

$x=7.$

For the second case, $3x-9=-12$ , we add 9 to both sides to get

$3x=-3$ .

Dividing both sides by 3 gives

$x=-1$ .

Checking both cases, we plug in $x=7$ and $x=-1$ .

For the first case, we have $|3(7)-9|=|21-9|=|12|=12$ , which satisfies the equation.

For the second case, we have $|3(-1)-9|=|-3-9|=|-12|=12$ , which also satisfies the equation.

This gives us two solutions to the equation; $x=7$ and $x=-1$ .

4 0

1 year ago

You are converting 8 centimeters to meters

morpeh [17]

Answer:

8cm = 0.08m

Step-by-step explanation:

8×10^-2 Because we convert

from cm to m.

8 0

3 years ago

Read 2 more answers

Jacob runs 5 miles in 1 1/2 hours . Robert runs 3 miles in 45 minutes or 3/4 hour. Who runs faster

IgorLugansk [536]

Answer:

Robert

Step-by-step explanation:

If Robert runs 3 miles in 45 minutes, by the end of 90minutes, Robert would have covered 6miles, while Jacob covered 5miles in 90 minutes, therefore, Robert ran faster than Jacob.

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2 years ago

Which is a question you probably would ask when comparison shopping? A. What is the warranty on this product versus another prod

densk [106]

Answer:

The answer is B.

Step-by-step explanation:

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2 years ago

In an ecological study, the sampling mean proportion is 0.28 and the sample size is 50. What is the margin of error with a confi

babunello [35]

In an ecological study, the sampling mean proportion is 0.28 and the sample size is 50. a) What is the margin of error with a confidence level of 95%?
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2 years ago