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slava [35]
3 years ago
8

A quality control technican checked a sample of 30 bulbs. Two of the bulbs were defective. If the sample was representative, fin

d the number of bulbs expected to be defective in a case of 450.
Mathematics
1 answer:
masha68 [24]3 years ago
3 0

Answer:30

Step-by-step explanation: Put 30 times 15 into a calulater. Then do 15 times  2 then you find your answer.

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Point M is the midpoint of AB . Through point M a line segment XY is drawn, so that both XA and YB are perpendicular to AB . Pro
GaryK [48]

Answer:

See the proof below

Step-by-step explanation:

Let the line AB be a straight line on the parallelogram.

A dissection of the line (using the perpendicular line X) gives:

AY ≅ BX

Another way will be using the angles.

The angles are equal - vertically opposite angles

Hence the line  AY ≅ BX (Proved)

8 0
3 years ago
Read 2 more answers
I need help please and thank you
azamat

Answer:

I believe it's B ............

8 0
2 years ago
Identify the coefficient(s), constants, and number of terms for the following expression:
shusha [124]
The given expression is: 4 x^{2} -5

So, there are two terms in the expression
1) 4 x^{2}
2) -5

The constant term is -5. 
The co-efficient of 4 x^{2} is 4.
7 0
3 years ago
Twenty percent of the ice melted. If 680 grams<br> remained, how many grams melted?
musickatia [10]

Answer:

−33999/50

Step-by-step explanation:

2/100−680

=

1/50−680

=

−33999/50

5 0
3 years ago
Anyone I need help with this problem plss
Nady [450]

Answer:

About 1.23 standard deviation above the mean

Step-by-step explanation:

From what we have here, we need to calculate the difference between the given value and the mean and divide by the standard deviation

That would be through calculating the z score as follows;

z-score = (x - mean)/SD

where x is the given value

z-score = (87-71)/13 = 1.23

Since the score is bigger than the mean, the correct choice here is that the score is about 1.23 standard deviation above the mean

3 0
2 years ago
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