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Flura [38]
3 years ago
10

I don’t know how to do this can someone help me please i put 30 points...

Mathematics
1 answer:
kolbaska11 [484]3 years ago
4 0

Answer:

5

Step-by-step explanation:

3x+2-3x+7+5x

3x-3x+5x+2+7

5x+9

Coefficient is the 5 of the 5x.

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a slitter assembly contains 48 blades five blades are selected at random and evaluated each day for sharpness if any dull blade
son4ous [18]

Answer:

P(at least 1 dull blade)=0.7068

Step-by-step explanation:

I hope this helps.

This is what it's called dependent event probability, with the added condition that at least 1 out of 5 blades picked is dull, because from your selection of 5, you only need one defective to decide on replacing all.

So if you look at this from another perspective, you have only one event that makes it so you don't change the blades: that 5 out 5 blades picked are sharp. You also know that the probability of changing the blades plus the probability of not changing them is equal to 100%, because that involves all the events possible.

P(at least 1 dull blade out of 5)+Probability(no dull blades out of 5)=1

P(at least 1 dull blade)=1-P(no dull blades)

But the event of picking one blade is dependent of the previous picking, meaning there is no chance of picking the same blade twice.

So you have 38/48 on getting a sharp one on your first pick, then 37/47 (since you remove 1 sharp from the possibilities, and 1 from the whole lot), and so on.

Also since are consecutive events, you need to multiply the events.

The probability that the assembly is replaced the first day is:

P(at least 1 dull blade)=1-P(no dull blades)

P(at least 1 dull blade)=1-(\frac{38}{48}* \frac{37}{47} *\frac{36}{46}*\frac{35}{45}*\frac{34}{44})

P(at least 1 dull blade)=1-0.2931

P(at least 1 dull blade)=0.7068

5 0
3 years ago
What should the next lette be? A Z E B I Y O
myrzilka [38]

The letter C, because the pattern is this (I think):

Every two letters it states the vowels (a,e,i,o,u)

Then in between every two letters there starts a pattern of, saying the alphabet in order and saying the alphabet backwards.


In other words they merged these two lines:

A, B, C, D, E...

+

Z, Y, X, W, V...

=

A, Z, B, Y, C, X...etc.

then by adding this pattern of vowels you get:

A, Z, E, B, I, Y, O, (C), (U), (X)...


7 0
2 years ago
How would you graph this function?<br> <img src="https://tex.z-dn.net/?f=y%3D-2x%5E2-16x-30" id="TexFormula1" title="y=-2x^2-16x
NNADVOKAT [17]

Answers Attached

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7 0
3 years ago
Read 2 more answers
Uh please answer correctly I’ll mark you brainlist after I see if it’s correct!
zepelin [54]

Answer:

The equation for the volume of a rectangular prism is V=whl or width x height x length. The width is 7/2, the height is 7/5, and the length is 5. Multiply all of these numbers to get 49/2 or 24.5.

6 0
3 years ago
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State whether the lines are parallel, perpendicular or neither. y = x+1 y = -x-2 (5 points) A. Parallel B. Perpendicular C. Neit
Anuta_ua [19.1K]
B. perpendicular is correct
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