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alukav5142 [94]
2 years ago
13

Find the mean, variance, and standard deviation of the binomial distribution. (round to the

Mathematics
1 answer:
shusha [124]2 years ago
8 0
Sixty eight and nine plus eleven equals 12
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One month, ruby worked 6 more hours than Issac, and Svetlana worked 4 times as many hours as Ruby. Together they worked 126 hour
garik1379 [7]
Ruby's hours will represent x+6
Svetlana's hours will represent 4(x+6)
Issac will represent x.

The equation would read:
x+(x+6)+(4(x+6))=126
x+x+6+4x+24=126
6x+30=126
Subtract 30 from both sides.
6x=96
Divide 6 on both sides to get x by itself.
x=16

So:
Issac worked 16 hours
Ruby worked 22 hours
Svetlana worked 88 hours.

To check your answer, plug in the values:
16+22+88=126
126=126

Hope this helps.
8 0
3 years ago
A cellphone service provider charges $5.00 per month and $0.20 per minute per call. If a customer's current bill is $55, how man
andreev551 [17]

Answer:

250 minutes

Step-by-step explanation:

Given,

Cell phone charges for a month = $ 5.00,

Additional charges per minute = $0.20,

Let the cell phone is used for x minutes for a month such that the total bill is $ 55,

⇒ Cell phone charge for the month + additional charges for x minutes = $ 55

⇒ 5.00 + 0.20x = 55

Subtracting 5 on both sides,

0.20x = 50

x = 250,

Hence, the cell phone is used for 250 minutes.

Third option is correct.

3 0
2 years ago
5. Car rental company A charges $30 a days and
olga nikolaevna [1]

Answer:

Step-by-step explanation:

I need  the answer for same question pleas

5 0
3 years ago
Read 2 more answers
Help help help help help
Vladimir [108]

Answer:

D.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Please help i think the answer is c but im not sure
katrin2010 [14]

Answer:

It's C

Step-by-step explanation:

Because the angle measurements are the same on rectangles and they have the same side lengths but the one on the right is a smaller rectangle which its only half the side of the bigger one.  

7 0
2 years ago
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