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ASHA 777 [7]
3 years ago
13

Construct and interpret a 95% confidence interval estimate for the difference in the mean number of cell phone calls per month f

or 18-24-year-olds and 45-54-year-olds.
Mathematics
1 answer:
dsp733 years ago
5 0

Answer:

25 per month

Step-by-step explanation:

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Marcus needs to bike at least 80 mi this week for a training if he has already bike 25 mi this week then how many miles should h
Rashid [163]

Marcus needs to bike at least 11 miles each day.

Step-by-step explanation:

Given,

Distance to cover = 80 miles at least

Distance already biked = 25 miles

Number of days left = 5

Let,

x be the distance to cover in 5 days.

According to given statement;

Number of days left * Distance to cover + distance already bike ≥ Total distance to travel

5x+25\geq 80\\5x+25-25\geq 80-25\\5x\geq 55

Dividing both sides by 5

\frac{5x}{5}\geq \frac{55}{5}\\x\geq 11

Marcus needs to bike at least 11 miles each day.

Keywords: inequality, division

Learn more about division at:

  • brainly.com/question/10081622
  • brainly.com/question/10341324

#LearnwithBrainly

7 0
3 years ago
Convert for 2/3 to a fraction greater than one
Salsk061 [2.6K]

Answer: 14/3

You need to multiply 3 x 4 then add the 2

4 0
3 years ago
Read 2 more answers
Solve the inequality 25x + 12y + 4 <= 130
hodyreva [135]

31x is the answer ok


6 0
3 years ago
Factor completely 3x2 + y. x(3x + y) y(3x2) xy(3x + 1) Prime
Rainbow [258]

Answer:

Option (d) is correct.

The given polynomial 3x^2+y is a prime polynomial.

Step-by-step explanation:

Given : 3x^2+y

We have to factorize it completely.

Since , factorization is the process of reducing a given polynomial into a lower degree polynomial by taking common factors out into the simplest form.

Consider the given polynomial 3x^2+y

Since the given polynomial do not have any term common in both terms .

So we cannot factorized it further.

So, the given polynomial 3x^2+y is a prime polynomial.

Thus, Option (d) is correct.

 

5 0
3 years ago
Read 2 more answers
If y varies directly with x and y is 10 when x is 5 then what is y when x is 2
vova2212 [387]

Answer:

y is 4

Step-by-step explanation:

so the equation is y = kx ( k is the constant)

We've been given x as 5 & y as 10 so we can use these values to find the constant .

10 = k(5)

k = 2

so now , we can find y

y = 2 × 2

y = 4

8 0
2 years ago
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