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goldenfox [79]
1 year ago
10

the driving distance between Manchester and London is 195 miles. Faris intends to travel from Manchester to London by coach. The

coach will leave Manchester at 3:30pm. Faris assumes that the coach will travel at an average speed of 50mph. using his assumption, work out Faris's arrival time in London. it actually turns out that the coach has a lower average speed. describe how this affects the arrival time.
Mathematics
1 answer:
Dahasolnce [82]1 year ago
3 0

Answer:

7.24pm

Step-by-step explanation:

196+50=3.9h

0.9h=0.9x60mnt=54mnt

3.9h=3h 54mnt

3:30pm+3h 54mnt

3:30pm+3h 54mnt=7.2pm

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A 250-kVA, three-phase, 480-volt transformer requires 75 gallons of insulating oil to keep it properly cooled. How many liters i
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What is −34, 0.5, 23,−73, 1.2 in order from least to greatest?
denpristay [2]

Answer:

-73, -34, 0.5, 1.2, 23

Step-by-step explanation:

In Mathematics, the set of numbers are arranged in two ways. It means that the numbers can be arranged either in ascending order or descending order. If the numbers are arranged from the least to the greatest, then it is called ascending order. In this form, the numbers are in increasing order. The first number should be lesser than the second number.

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Standard Form

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Show that b^2 is greater than equal to or less than ac, according as a, b, c are in A.P., G.P.
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Answer/Step-by-step explanation  (ac > b² or b² < ac. )

A/c to question, we have to show:-

b² >ac in A.P ........ (1)

b² = ac in G.P .....(2)

b² < ac in H.P. ..... (3)

b = a+c/2 (A.P)

b = √ac ( G.P)

b = 2ac/a+c (H.P)

In A.P :

b² > ac = b² - ac

= (a+c/2)² - ac

= (a²+2ac+c²/4) - ac  = a² + 2ac + c² - 4ac / 4

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In G.P:-

b = √ac

Hence, b² = ac

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= ac(a+c) - 2ac / a+c

= a²c + ac² - 2ac / a+c

= ac(2ac - 2) / a+c > 0

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