x + x + x + 2
There are 3 x's so that's
3x + 2
Yeah, you're right is D
2(x + 1) + x = 2x + 2 + x = 3x + 2
The other answer
To get the mean you would add the 3 numbers to gether then divide by 3. So to get this I did this, 7+7+S= Then I repalced to S with 4 and i got 7+7+4=18. Then to get the mean I have to divide by how many numbers i added, so 18/3=6. 6 is the mean.
Hope this helps☺
Answer:
The mean score is 7.31. This means that each time the student takes this test, he is expected to get a score of 7.31.
Step-by-step explanation:
We have these following probabilities:
A 0.07 = 7% probability that the student scores 5 points.
A 0.17 = 17% probability that the student scores 6 points.
A 0.38 = 38% probability that the student scores 7 points.
A 0.21 = 21% probability that the student scores 8 points.
A 0.1 = 10% probability that the student scores 9 points.
A 0.07 = 7% probability that the student scores 10 points.
Mean score
We multiply each score by it's probability. So
The mean score is 7.31. This means that each time the student takes this test, he is expected to get a score of 7.31.
I’m pretty sure it’s C and if I’m wrong I’m very sorry I probably did some math wrong
30,000’s place
Brainlyest please
Please