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kow [346]
3 years ago
7

A 3x4x5 rectangular cuboid (e.g. a brick) is painted blue and cut into 1x1 cubes. what is the expected value for the painted sid

es of a randomly selected cube?
Mathematics
1 answer:
Anton [14]3 years ago
4 0

Answer:

8 cubes are painted on 3 sides

24 cubes are painted on 2 sides

22 cubes are painted on 1 sides

6 cubes are painted on 0 side

E = 3 * 8/60 + 2 * 24/60 + 1 * 22/60 + 0 * 6/60 = 47/30 = 1.567

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What is a line that passes through (-7,3 and (-6,-1)
Serggg [28]

Answer:

y=-4x-25

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-1-3)/(-6-(-7))

m=-4/(-6+7)

m=-4/1

m=-4

y-y1=m(x-x1)

y-3=-4(x-(-7))

y-3=-4(x+7)

y=-4x-28+3

y=-4x-25

3 0
3 years ago
Please answer correctly !!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!
melisa1 [442]

Answer:

x=-1

Step-by-step explanation:

7 0
2 years ago
If there was 985 pencils and some was sold and there were 559 pencils left how many pencils were sold
miskamm [114]
Now to solve this equation you have to take the # of pencils (985) and subtract it from the # of pencils left 
985-559=425
$26 pencils were sold

6 0
2 years ago
A club with seventeen members is to choose three​ officers: ​ president, vice-president, and​ secretary-treasurer. Of each offic
skelet666 [1.2K]

Answer:

The offices can be filled in 4080 ways.

Step-by-step explanation:

This question can simply be solved by permutations.

For the first office there are 17 people available, for the second office 16 people are available, and for the third office 15 people are available.

17x16x15 = 4080 ways.

It can be also thought in a simpler way by thinking that we are to make a combination of 3 people from 17 people and those 3 people can further be ordered into 3! ways. So the number of ways are:

3! x 17C3 = 17P3 = 4080 ways

7 0
2 years ago
If f(x)=x+8 and g(x)=-4x-3,find(f+g).
Dennis_Churaev [7]

Answer:

5/3

Step-by-step explanation:

x+8+(-4x-3)= x+8-4x-3=

-3x=-5

X=5/3

4 0
3 years ago
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