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melisa1 [442]
3 years ago
13

There are 90 people in a group.

Mathematics
1 answer:
rewona [7]3 years ago
8 0

Answer:

45 children 15 men 30 women

Step-by-step explanation:

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Find the value of x when 6-3x= 5x-10x+20
icang [17]

Answer:

7

Step-by-step explanation:

5 0
3 years ago
Suppose the speeds of vehicles traveling on a highway are normally distributed and have a known population standard deviation of
erik [133]

Answer:

2.88

Step-by-step explanation:

Data provided in the question

\sigma = Population standard deviation = 7 miles per hour

Random sample = n = 32 vehicles

Sample mean = \bar X = 64 miles per hour

98% confidence level

Now based on the above information, the alpha is

= 1 - confidence level

= 1 - 0.98

= 0.02

For \alpha_1_2 = 0.01

Z \alpha_1_2 = 2.326

Now the margin of error is

= Z \alpha_1_2 \times \frac{\sigma}{\sqrt{n}}

= 2.326 \times \frac{7}{\sqrt{32}}

= 2.88

hence, the margin of error is 2.88

5 0
3 years ago
stion 13: A typical barrel of bot-oil contains 70 liters of oil. If a hole he barrel is causing a constant 6 liters an hour leak
Montano1993 [528]

Answer:

y = -6x + 70

Step-by-step explanation:

Since the amount of oil in the tank decreases constantly, we need to create a linear function. Using the base form, y = mx + b, we can replace -6 for m because volume decreases by 6 (or increases by -6) each hour, and +70 for b because we start off with 70 liters of oil. So we get y = -6x + 70, with x representing the number of hours, and y representing the volume of oil remaining.

4 0
2 years ago
The line that passes through the points (9,1) and (5,5) intersects the y-axis at (0,5).
Ilia_Sergeevich [38]
The stament are true I think
6 0
3 years ago
Help please. and thank you
Dominik [7]
Every Triangle adds up to 180 degrees

180 - 63 = 117 | 117 - 56 = 61 so x = 61

12y + 3 = 51 so y = 4
8 0
3 years ago
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