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Sloan [31]
3 years ago
9

A car travels at an average speed of 45 miles per hour for 8 miles, reduces its speed by 15 miles per hour for the next 4 miles,

and then returns to a speed of 45 miles per hour. How long does the car travel at the reduced speed?
Mathematics
1 answer:
kifflom [539]3 years ago
8 0

Answer:

8 minutes

Step-by-step explanation:

time = distance/speed

A decrease of 15 mph from 45 mph means the speed on the second segment is 30 mph. Filling in the given values in the above equation, we have ...

... time = (4 mi)/(30 mi/h) = 4/30 h = 8/60 h × (60 min/h) = 8 min

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For the rectangle shown, which equation can be used to find the value of x?​
trasher [3.6K]

Answer:

Pythagorean theorem a^{2} +b^{2} =c^{2}

Step-by-step explanation:

a^{2} +b^{2} =c^{2} \\x^{2} +3.6^{2} =7.4^{2} \\x^{2} +12.96=54.76\\x^{2} =\sqrt{41.8} \\x=6.47\\

6 0
3 years ago
Write an explicit formula for the sequence 7, 2, –3, –8, –13, find the 14th term
Ilia_Sergeevich [38]

The 14th term is equal to -44.

y = 12 - 5x

The sequence can be represented by this function.

Each term is being subtracted by 5.

Using this function we can find the 14th time.


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6 0
3 years ago
Chan deposited money into his retirement account that is compounded annually at an interest rate of 7%. Chan thought the equival
dedylja [7]

Answer:

No, equivalent quarterly rate will be approx 1.75%

Step-by-step explanation:

Given that Chan deposited money into his retirement account that is compounded annually at an interest rate of 7%.

We know that there are 4 quarters in 1 year.

So to find that equivalent quarterly we will divide given yearly rate by number of quarters.

That means divide 7% by 4.

which gives 1.75%.

But that is different than Chan's though of 2% quarterly interest.

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4 0
3 years ago
A car manufacturer is reducing the number of incidents with the transmission by issuing a voluntary recall. During week 3 of the
S_A_V [24]

Answer:

y(t) = 391 - 30t

Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Please answer this correctly without making mistakes
IrinaVladis [17]

Answer:

\boxed{\sf 319:3388}

Step-by-step explanation:

Total number of tickets sold = 3388

Total number of coach tickets = 3069

Total number of first-class tickets = Total number of tickets sold - Total number of coach tickets

= 3388 - 3069

= 319

\therefore

Ratio of the number of first-class tickets to the total number of tickets = 319:3388

8 0
3 years ago
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