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3 years ago

The range of F(x)=6*3x is all positive real numbers, is this true or false?

1 answer:

6 0

$If\ f(x)=6\cdot3x\ then\ the\ range\ is\ all\ real\ numbers$

Answer: FALS

$If\ f(x)=6\cdot3^x\ then\ the\ range\ is\ all\ positive\ real\ numbers$

Answer: TRUE

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Band practice lasted 4/5 of an hour. 2/3 of that time was spent marching. How many minutes were they marching?

GuDViN [60]

Answer: They were marching for 32 minutes.

Step-by-step explanation: If you multiply the 4/5 times by 60 minutes (1 hour), then you will get 48 minutes. 48 minutes is the time of the band practice. Once you get that, then multiply that by 2/3 to get the amount of minutes marching. Once you multiply 2/3*48, you will get 32, which is how many minutes they were marching during band practice.

8 0

3 years ago

2. A ski lodge offers two weekend packages. Package A provides 2 nights and 3 meals for $280. Package B provides 2 nights and 5

Semenov [28]

Answer:

see below

Step-by-step explanation:

Package A

2n + 3m = 280

Package B

2n + 5m = 320

Using elimination to eliminate n since the coefficient is the same

Subtracting the A equation from the B equation

2n + 5m = 320

-2n - 3m = -280

------------------------

2m = 40

Divide by 2

2m/2 = 40/2

m = 20

Now finding n

2n+3m = 280

2n +3(20) = 280

2n+60 = 280

Subtract 60 from each side

2n +60-60= 280-60

2n = 220

Divide by 2

2n/2 = 220/2

n = 110

The cost per night is 110 and the cost per meal is 20

4 0

3 years ago

he National Center for Health Statistics interviewed 5409 adult smokers in 2015, and 2666 of them said they had tried to quit sm

ikadub [295]

Answer:

95% confidence interval for the proportion of smokers who have tried to quit within the past year

(0.47956 ,0.50620)

Step-by-step explanation:

Step(i):-

Given that National Center for Health Statistics interviewed 5409 adult smokers in 2015

Sample size 'n' = 5409

Given that 2666 of them said they had tried to quit smoking during the past year.

proportion

$P = \frac{x}{n} = \frac{2666}{5409} = 0.49288$

Q = 1 - P = 1 - 0.49288 = 0.50712

Step(ii):-

95% confidence interval for the proportion of smokers who have tried to quit within the past year

$({P - Z_{0.05} \sqrt{\frac{PQ}{n} } , P + Z_{0.05} \sqrt{\frac{PQ}{n} )$

$({0.49288 - 1.96 \sqrt{\frac{0.49288 X 0.50712}{5409} } , 0.49288 + 1.96\sqrt{\frac{0.49288 X 0.50712}{5409} )$

(0.49288 - 0.01332 , 0.49288+0.01332)

(0.47956 , 0.50620 )

Final answer:-

95% confidence interval for the proportion of smokers who have tried to quit within the past year

(0.47956 ,0.50620)

5 0

2 years ago

Simplify (3x2 - 2) + (2x2 - 6x + 3). (1 point)

Oxana [17]

Answer:

A) 5x² - 6x + 1

Step-by-step explanation:

In this question, you would have to simplify the expression.

Solve:

(3x² - 2) + (2x² - 6x + 3)

Combine like terms.

3x² - 2 + 2x² - 6x + 3)

5x² - 2 - 6x + 3

5x² - 6x + 1

Since there's no more like terms, we have completely simplified the expression.

Therefore, your answer would be A) 5x² - 6x + 1

6 0

3 years ago

Betty and carl will conduct an experiment they will flip a coin 100 times and record the result of each flip.What should they ex

Oksana_A [137]

Answer:

well theres a 1:2 ratio so they could expect half to be heads and half to be tails but its all up to chance.

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers