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Lisa [10]
2 years ago
7

The table below shows the probability distribution of students in a high school with 1500 students. What is the expected value f

or the age of a randomly chosen student?
Age
13, 14, 15, 16, 18
Probability
0.01, 0.28, 0.30, 0.25,0.15,0.01

A. 15.28
B. 15.64
C. 15.34
D. 15.36

Mathematics
1 answer:
lakkis [162]2 years ago
4 0
D for sure I hope it helps and I know I’m 100% right because I already had this question somewhere else dude so yeah
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-3x+4y=12 and 2x+y=-8. How do you solve this using substitution ?
elena-s [515]

Answer:

in point from: (-4,0) in equation from: x=-4,y=0

Step-by-step explanation:

8 0
2 years ago
1) A spice merchant divided 9/10 of a pound of ground cinnamon into 9 equal packages. He then sold the ground Cinnamon to restau
olya-2409 [2.1K]
The answer are
1. A
2.C
7 0
2 years ago
Can someone plz help me
Goshia [24]

Answer:

Your table might look something like this:

The dads steps:

3

6

9

12

15

18

Sons steps:

5

10

15

20

25

30

You can notice the pattern. If dad walks 3 steps, son walks 5. If dad walks another 3, son walks another 5. And so on. This means dad walks 12 steps when the sin walks 20 steps.

Step-by-step explanation:

The ratio is 3:5. This means dad wlaks 3 steps so son must walk 5 steps basically. So.......... You can now create the table. Y I just have to multiply or divide each side ( of the colon:) so. Whatever you do to one side, you do to the other side. If you x3 on one side, you do it to other. Same goes for division. In the 'table' I did above, I x2 to get 6 and 10. Then I took the 3 and the 5 again and timsed those by 3. You can also change the 6 and the 10. So:

3:5

Then x2

6:10

Then I take the top layer (you can either choose to change the top layer, or layer above as long as you do the same thing to each side. Remember, only x and ÷. No + or-.) and I x3

9:15

Then I could take 9 and 15 and x5

45:75

It's crazy that all these. Ratios mena the same thing! 45 steps from dad would take the son 75 steps. You can also divide the last ratio of 45:75 to find the one you started with, 3:5.

So you get the idea.

It is probably best to do what I did in the table in the answer part because I did a pattern. Take the top layer, and x2, then x3, then x4, ect. Rather then doing random things.

5 0
3 years ago
What is x2 – 6 = 16x + 30 rewritten in standard form, then factored?
kaheart [24]

Answer:

Step-by-step explanation:

x^2-6=16x+30\\\mathrm{Subtract\:}30\mathrm{\:from\:both\:sides}\\x^2-6-30=16x+30-30\\Simplify\\x^2-36=16x\\\mathrm{Subtract\:}16x\mathrm{\:from\:both\:sides}\\x^2-36-16x=16x-16x\\\Simplify\\x^2-16x-36=0

5 0
3 years ago
Why is 21 over 30 bigger than 2 over 3?
Nikitich [7]
21/30 simplifies to 2.1/3 so it's a little bit bigger
3 0
3 years ago
Read 2 more answers
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