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Lubov Fominskaja [6]
3 years ago
7

You 495 miles from home and you are driving toward home at an average of 45mph. How long will it take to drive home if you maint

ain the same speed? (Hint: When you reach home, the x-value is zero.) explain it to me please
Mathematics
2 answers:
Karo-lina-s [1.5K]3 years ago
5 0
I hope this helps you




Distance=speed.time



495=45.t


t=11
Mars2501 [29]3 years ago
5 0

Answer:

11 hours will it take to drive home.

Step-by-step explanation:

Formula

Speed = \frac{Distance}{Time}

As given

You 495 miles from home and you are driving toward home at an average of 45mph.

Speed = 45 mph

Distance = 495 miles

Put in the formula

45 = \frac{495}{Time}

Time = \frac{495}{45}

Time = 11 hours

Therefore the 11 hours will it take to drive home.

You might be interested in
At a movie theatre adult tickets cost $10 and child ticjets cost $6. Which equation can be used to find s, the number of dollars
timurjin [86]

Answer:

s = 10k + 30

Step-by-step explanation:

Cost of Adults ticket = $10 per adult

Cost of Ticket = $6 per child

Number of adults = k

Number of Children = 5

s = Total cost

Total cost = (Cost per adult * number of adults) + (Cost per child * Number of children)

s = ($10 * k) + ($6 * 5)

s = $10k + $30

s = 10k + 30

4 0
2 years ago
Scores on a final exam taken by 1200 students have a bell shaped distribution with mean=72 and standard deviation=9
SVETLANKA909090 [29]

Answer:

a. 72

b. 816

c. 570

d. 30

Step-by-step explanation:

Given the graph is a bell - shaped curve. So, we understand that this is a normal distribution and that the bell - shaped curve is a symmetric curve.

Please refer the figure for a better understanding.

a. In a normal distribution, Mean = Median = Mode

Therefore, Median = Mean = 72

b. We have to know that 68% of the values are within the first standard deviation of the mean.

i.e., 68% values are between Mean $ \pm $ Standard Deviation (SD).

Scores between 63 and 81 :

Note that 72 - 9 = 63 and

72 + 9 = 81

This implies scores between 63 and 81 constitute 68% of the values, 34% each, since the curve is symmetric.

Now, Scores between 63 and 81 = $ \frac{68}{100} \times 1200 $

= 68 X 12 = 816.

That means 816 students have scored between 63 and 81.

c. We have to know that 95% of the values lie between second Standard Deviation of the mean.

i.e., 95% values are between Mean $ \pm $ 2(SD).

Note that 90 = 72 + 2(9) = 72 + 18

Also, 54 = 63 - 18.

Scores between 54 and 90 totally constitute 95% of the values. So, Scores between 72 and 90 should amount to $ \frac{95}{2} \% $ of the values.

Therefore, Scores between 72 and 90 = $ \frac{95}{2(100)} \times 1200 = \frac{95}{200} \times 1200  $

$ \implies 95 \times 12 $ = 570.

That is a total of 570 students scored between 72 and 90.

d. We have to know that 5 % of the values lie on the thirst standard Deviation of the mean.

In this case, 5 % of the values lie between below 54 and above 90.

Since, we are asked to find scores below 54. It should be 2.5% of the values.

So, Scores below 54 = $ \frac{2.5}{100} \times 1200 $

= 2.5 X 12 = 30.

That is, 30 students have scored below 54.

8 0
2 years ago
Help pls whats the output
-Dominant- [34]

Answer:

its b

Step-by-step explanation:

3 0
3 years ago
HELP!!!!!!! 27 POINTS!!!!!!!!
jolli1 [7]
I think it’s 138
Hope this helps
5 0
3 years ago
Please help ASAP if you know how. Thanks so much
zlopas [31]
I’m not so sure i’m sorry
6 0
3 years ago
Read 2 more answers
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