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Lunna [17]
3 years ago
11

What is the simplified form of the following expression? Assume

Mathematics
1 answer:
HACTEHA [7]3 years ago
4 0

Answer:

yes a

Step-by-step explanation:

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1/7 of all students achieved great success in the written exercise in mathematics. 3/7 very good success. 2/7 good success, whil
laila [671]

Answer:

x = 28

Step-by-step explanation:

Let the total number of students = x

x/7 + 3x/7 + 2x/7 + 4 = x If that is all there is.  If it isn't the problem can't be done. Combine like terms.

x(1 + 3 + 2)/7 + 4 = x

x (6/7) + 4 = x                       Subtract 6x/7 from both sides

4 = x - 6x/7

4 = 7x/7 - 6x/7                     Combine

4 = 1/7x                                Multiply both sides by 7

4*7 = 7x / 7

x = 28

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2 years ago
During a thunderstorm, 600 millimeters of rain fell in 30 minutes. How fast did the rain fall, in millimeters per hour? NOOO BOT
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Step-by-step explanation:

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7 0
2 years ago
Read 2 more answers
Can somebody help me please ?? :) Thank u if u do
Lorico [155]
SF = 9/18 = 1/2 or 0.5

answer
1/2 or 0.5
5 0
3 years ago
The battery standby duration (in hours) of a new model of cell phone is known to be normally distributed. Ten pieces of such new
Stells [14]

x = number of hours

want to find probability (P) x >= 13

x is N(14,1) transform to N(0,1) using z = (x - mean) / standard deviation so can look up probability using standard normal probability table.

P(x >= 13) = P( z > (13 - 14)/1) = P(z > -1) = 1 - P(z < -1) = 1 - 0.1587 = 0.8413

To convert that to percentage, multiply 100, to get 84.13%

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3 years ago
The difference between the amount of money spent on furniture and electrical appliances is 820. they spent a total of $12498 on
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They spent 5839 on electrical appliances and 6659 on furniture
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