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3 years ago

Car a travels 0.5 miles per hour faster than car

Mathematics

2 answers:

babymother [125]3 years ago

7 0

Answer:

Car B drives in 16 hours 1272 miles.

Step-by-step explanation:

Car A drives 1280 miles in 16 hours.

Speed = $\frac{Distance}{Time}$

The speed rate of car A = $\frac{1280}{16}$ = 80 miles per hour

Car A travels 0.5 miles per hour faster than car B.

∴ Speed of car B = 80 - 0.5 = 79.5 miles per hour

If car A drives 1280 miles in 16 hours.

∴ car B drives in 16 hours = 79.5 × 16 = 1272 miles

Car B drives in 16 hours 1272 miles.

Crazy boy [7]3 years ago

3 0

Average speed for car a = 1280 / 16 = 80 mph
Car b travels at 80 - 0.5 = 79.5 mph.

Distance car b will travel in same time = 16*79.5 = 1272 miles.

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A puppy and a kitten are 180 meters apart when they see each other. The puppy can run at a speed of 25 m/sec, while the kitten c

ser-zykov [4K]

Answer: 36 sec

Step-by-step explanation:

Let

x------> distance the kitten runs before being caught by the puppy

Remember that

The speed is equal to divide the distance by the time

v=d/t

solve for t

t=d/v

equate the time

x/20=(180+x)/25

25x=20(180+x)

25x=3,600+20x

25x-20x=3,600

x=3,600/5=720 m

t=d/v=720/20=36 sec

t=(720+180)/25=900/25=36 sec

6 0

3 years ago

Read 2 more answers

Nick is now seven times as old as Harry. In 6 years, Nick will be five times as old as Harry. How old will Harry be in 6 years?

Deffense [45]

Answer:

7x+6 = 5(x+6)

Step-by-step explanation:

x represents Harry's age now, so 7x represents Nick's age now. (Nick is 7 times as old as Harry.)

In 6 years, Harry's age will be x+6.

In 6 years, Nick's age will be 7x+6, which is 5 times Harry's age at that time, 5(x+6). Hence an appropriate equation is ...

... 7x+6 = 5(x+6)

_____

Please note that finding the value of x does not give the answer to the question. We are asked for Harry's age in 6 years, so the answer is x+6 (=18).

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3 years ago

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Evaluate C(n, n).<br><br> A. 0<br> B. 1<br> C. n

horrorfan [7]

$C(n,n)=\dfrac{n!}{n!(n-n)!}=\dfrac1{0!}=\dfrac11=1$

In other words, how many ways are there to choose $n$ objects from a total of $n$ objects? Just one; take all of them at the same time.

4 0

3 years ago

A race

sashaice [31]

Answer: 187.7 mph

Step-by-step explanation:

v = 125 mph

t = 1.2 min

v2 = ?

t2 = 0.8 min

We can use the rule of 3 here. It's the inverse rule of 3 because as time decreases, speed increases.

$\frac{125mph}{x} =\frac{1.2min}{0.8min}$