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densk [106]
3 years ago
13

A set of final examination grades in a calculus course was found to be normally distributed with a mean of 69 and a standard dev

iation of 9. What percentage of students scored between 65 and 89?

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
7 0

Answer: 66%

Step-by-step explanation:

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3 years ago
Rachel, Adam, Michelle, Hannah, and James are going to the movies. They have $65 to spend on tickets and snacks. Each movie tick
alex41 [277]

Steps to solve:

47.5 + 4.5x ≤ 65

~Subtract 47.5 to both sides

4.5x ≤ 17.5

~Divide 4.5 to both sides

x ≤ 3.8888888889...

So, yes, the friends will have to share snacks.

Best of Luck!

3 0
3 years ago
Read 2 more answers
Please Help me. What is the answer?
vekshin1

Answer:

-11

Step-by-step explanation:

Triangle ABC

SO,

AB = AC +BC

x + 8 = 2x -5 + (BD + DC)

x + 8 = 2x-5 + 10 +14

x + 8 = 2x + 19

2x - x = -19 + 8

x = -11

5 0
3 years ago
Is Y equals 2.5 X proportional
Ivahew [28]

Answer:

no but 1+1=2 hehe

Step-by-step explanation:

follow me on tt: dxddy.drip0

6 0
3 years ago
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NeX [460]
X-3=66
x=69

69+41+(y-9)=180
110+y-9=180
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y=79
7 0
3 years ago
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