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Ket [755]
3 years ago
5

Which polynomial shows the difference of (4x2 + 3x - 2) and (x2 + 2x + 4)?

Mathematics
1 answer:
Marat540 [252]3 years ago
3 0

Answer:

b

Step-by-step explanation:

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1) A light bulb producing company states that its lights will last an average of 1200 hours with a standard deviation of 200 hou
Ronch [10]

The mean ( average ) is given as 1200 hours.

The standard deviation is 200, sample size is 100.

Find the standard error:

√(200^2 / 100) = 20

Now calculate the confidence interval. For 95% the Z number is 1.96

Multiply Z by the standard error:

1.96 x 20 =39.2

Now find the range that the mean should be within:

1200 - 39.2 = 1160.8

1200 + 39.2 = 1239.2

The samples should be between 1160.8 and 1239.2 for a 95% confidence interval.

Since the average was 1050, which is below 1160.8 the bulbs are not in compliance.

4 0
3 years ago
Perform the indicated operation<br>7+9+(4)<br>20<br>20<br>O12<br>O-12​
Ivahew [28]
The answer would be 20.

How?

7 + 9 = 16

16 + 4 = 20
7 0
3 years ago
what is the image of the point ( -4, 8) after a rotation of 90° counterclockwise about the origin ​
lesya [120]

Answer:(-8,-4)

Step-by-step explanation:

5 0
3 years ago
The two sets of lines are parallel. If the measure of angle A is 110°, what is the measure of angle B?
Mrrafil [7]

Answer:

Sum of 2 interior angles =180

1 angle+70=180

Another angle=110

Step-by-step explanation:

5 0
3 years ago
What kind of transformation is this?
neonofarm [45]

Answer:

Reflection

Step-by-step explanation:

It is a reflection because it is like they are looking in the mirror.

3 0
2 years ago
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