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kap26 [50]
3 years ago
10

Neil drives at an average speed of 60 miles/hour to reach

Mathematics
1 answer:
nikklg [1K]3 years ago
8 0

Answer:

 480/(x+60) ≤ 7

Step-by-step explanation:

We can use the relations ...

 time = distance/speed

 distance = speed×time

 speed = distance/time

to write the required inequality any of several ways.

Since the problem is posed in terms of time (7 hours) and an increase in speed (x), we can write the time inequality as ...

 480/(60+x) ≤ 7

Multiplying this by the denominator gives us a distance inequality:

 7(60+x) ≥ 480 . . . . . . at his desired speed, Neil will go no less than 480 miles in 7 hours

Or, we can write an inequality for the increase in speed directly:

 480/7 -60 ≤ x . . . . . . x is at least the difference between the speed of 480 miles in 7 hours and the speed of 60 miles per hour

___

Any of the above inequalities will give the desired value of x.

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Step-by-step explanation:

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2 years ago
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You are planning to invest $5000 in an account earning 9% per year for retirement. a. If you put the $5000 in an account at age
ICE Princess25 [194]

Answer:

A).Amount = $218250

B). Amount = $88700

Step-by-step explanation:

A) .$5000 in an account at age 23, and withdraw it 42 years

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Rate r= 9%

Number of times compounded n= 42

A= p(1+r/n)^(nt)

A= 5000(1+0.09/42)^(42*42)

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A= 218250

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B).waits 10 years before making the deposit, so that it stays in the account for only 32 years

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A= p(1+r/n)^(nt)

A= 5000(1+0.09/32)^(32*32)

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5 0
3 years ago
Determine the unknown side lengths’ to the nearest tenth. for the first question and also please help with question 6
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Answer:

z =15cm and

y=9.0cm

Step-by-step explanation:

Use sine rule

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Z = 12 x sin 90 / sin 53

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To find y the angle opposite to y will be 180-(90+53)=37º

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15/sin 90= y/sin37

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yaroslaw [1]
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GenaCL600 [577]

Step-by-step explanation:

4x2 - 25b2

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