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erastova [34]
2 years ago
13

One thousand students took a test resulting in a normal distribution of the scores with a mean of 80 and a standard deviation of

5. How many students scored between 70 and 90
Mathematics
1 answer:
zavuch27 [327]2 years ago
5 0
63 I believe is the answer
You might be interested in
50 POINTS!!
Charra [1.4K]

Answer:

FH=73

Step-by-step explanation:

We are given that a segment FH and G is the midpoint of FH.

FH=14x-4

FG=5x+9

We have to find the measure of FH.

When G is the midpoint of segment FH

Then , FG=GH

FH=FG+GH

Segment addition property

14x-4=FG+FG

Substitution property

14x-4=2FG

14x-4=2(5x+9)

14x-4=10x+18

14x-10x=18+4

4x=22

x=\frac{22}{4}=5.5

Substitute the values then we get

FG=5(5.5)+9=36.5

FG=GH=36.5

FH=14(5.5)-4=73

8 0
3 years ago
What is the value of x?
ser-zykov [4K]

Answer:

C

24Step-by-step explanation:

Trust me on this one.

4 0
3 years ago
2/5 of a number is what percantage of that number
iragen [17]

Answer:

40% of that number

8 0
4 years ago
Read 2 more answers
Piper has a points card for a movie theater. she receives 60 rewards points just for signing up. she earns 13.5 points for each
Arisa [49]

Answer:

10

Step-by-step explanation:

I first took away 60 from 195, as she already had 60 points. Than we were left with 135 points and since she gets 13.5 points every time she visits, I divided 135 by 13, which gives us 10.

3 0
2 years ago
PLEASE ANSWER FAST! WILL GIVE BRAINLIEST!
NemiM [27]

Answer:

Step-by-step explanation:

You need to find the area of each of the shapes by multiplying the length by the width. Then, you need to add them all together. I won't do it for you because it will make it harder to learn stuff in the future but I told you the formula!!

8 0
2 years ago
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