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inessss [21]
3 years ago
10

Jill was going to meet at the bus depot if she went during rush hour she would travel 15 mph and arrive 1 hour later if she went

after rush hour she would travel 30 mph and arrive an hour early
Mathematics
1 answer:
Keith_Richards [23]3 years ago
8 0

Answer:

The distance cover by Jill is 60 miles

Step-by-step explanation:

Given as :

The speed of Jill to cover the distance D during rush hour = 15 mph

Let The usual time taken to cover D distance = T hour

So, The time taken to travel during rush hour = ( T + 1 ) hour

The speed of Jill to cover the distance D after rush hour = 30 mph

And The time taken to travel after rush hour = ( T - 1 ) hour

Now,According to question

Distance = Speed × Time

Now, For during rush hour

D = 15 × ( T + 1 )

Or, D = 15 T + 15                         ........A

Again , For after rush hour

D = 30 × ( T - 1 )

Or, D = 30 T - 30                       ..........B

Solving Eq A and B

I.e  15 T + 15  =  30 T - 30          

Or, 15 + 30 = 30 T - 15 T

or, 45 = 15 T

∴ T = \frac{45}{15}

I.e T = 3 hour

So, The usual Time taken = T = 3 hour

Put the value of T in eq A

I.e D = 15 T + 15

Or, D = 15 × 3 + 15

∴  D = 60 miles

So, Distance = D = 60 miles

Hence The distance cover by Jill is 60 miles . Answer

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Answer:

Step-by-step explanation:

This is exponential, of the form

y=a(b)^x where a is the initial amount and b is the growth/decay rate. If Ginny begins the study with 1200 frogs in the population, our a value is 1200.

If the population is decreasing 3% per year, it is decreasing 100% - 3% = 97% which, as a decimal, is .97. Our exponential function, then, is

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6 0
3 years ago
75% of the temperatures are below what value? How do you know? 75% of the temperatures are above what value? How do you know? Wh
Savatey [412]

Answer:

Complete Question:

Pick a city in Maryland and determine the average high temperatures for each month. Record this in a table.

a. Create a box-and-whisker plot for the data.

b. What is the median temperature?

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Step-by-step explanation:

TASK 3

The city picked is Baltimore, the year 2017.

The table is attached in picture #1.

a) The box-and-whisker plot is attached in picture #2.

b) The median is the central value of the distribution i.e:  

42.4, 45.3, 46.8 | 54.7, 57.6, 66.0 | 69.1,  76.5,  80.6 | 85.8, 87.8, 90.0 

where we marked with a tally the quartiles.

As we have 12 values,  the average between the two central values will be the median :

M = (66.0 + 69.1) / 2 = 67.1 °F

c) 75% of the temperatures are below 83.2 °F.

Indeed, this value represents the third quartile. The position of the third quartile can be found by the formula:

3/4 · (n + 1) = 3/4 · (12 + 1) = 3/4 · 13 = 9.75

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1/4 · (n + 1) = 1/4 · 13 = 3.25

And therefore:

q₀.₂₅ = (46.8 + 54.7) / 2 = 50.8 °F. 

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25% of the year the high temperatures were warmer than 83.2 °F, with no outlier above 90.0 °F which was the hottest temperature.

25% of the high temperatures were colder than 50.8 °F, with no outlier below 42.4 °F, which was the coldest high temperature.

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Step-by-step explanation:

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4 0
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Read 2 more answers
-10+|6+-17| - - 14 show how you got the answer
mel-nik [20]

Answer:

15

Step-by-step explanation:

-10+\left|6+\left(-17\right)\right|-\left(-14\right)
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Subtract.
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Now, add.
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Apply absolute rule.
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Answer:

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