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Mathematics 17 Online
oregonduck (oregonduck):

FAN AND MEDAL FOR ANSWER!!!

oregonduck (oregonduck):

A set of numbers is shown below: {0, 0.6, 2, 4, 6} Which of the following shows all the numbers from the set that make the inequality 2x + 3 ≥ 7 true? {4, 6} {0, 0.6, 2} {0, 0.6} {2, 4, 6} Question 4 (Multiple Choice Worth 1 points) (08.05 MC) Meg scored 45, 48, and 56 on three tests. How many points should she get on the fourth test to get an average score of 60? 49.67 points 52.25 points 91 points 93 points

OpenStudy (anonymous):

For the first one, we'll plug in the numbers in the set to see which ones will work.

oregonduck (oregonduck):

(2,4,6)?

OpenStudy (anonymous):

Yes, that would be it. Good job :)

oregonduck (oregonduck):

how about the second one?

OpenStudy (anonymous):

Do you know how to get an average?

oregonduck (oregonduck):

yes

OpenStudy (anonymous):

So can you get the average of 45,48, and 46, and tell me what you get? :)

OpenStudy (anonymous):

Whoops, 56*

oregonduck (oregonduck):

49.6666666667

OpenStudy (anonymous):

Right. Now we want the average of 4 tests to be 60. So we need the average to go up 10. So we can represent this with \[\large \frac{45+48+46+x}{4}=60\] Now we need to get x alone

oregonduck (oregonduck):

x=91

OpenStudy (anonymous):

Correct! Good job :)

oregonduck (oregonduck):

thxs

OpenStudy (anonymous):

\[\huge \color{aqua}N\color{fuchsia}o \space \color{lime}P \color{orange}r \color{blue}o \color{maroon}b \color{red}l \color{olive}e \color{purple}m \ddot\smile \]

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