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1 year ago

5. Two trains travel in the same direction on

1 answer:

6 0

If the speed of train A is 90 kilometers per hour and the speed of train B is 100 kilometers per hour then after 5 hours they will be in the same place.

Given that the speed of train A is 90 kilometers per hour and the speed of train B is 100 kilometers per hour.

We are required to find the time after which both the trains will be in same place.

Speed is basically the distance travelled in a particular time.

Speed=Distance/Time.

Because the difference between both the train A and train B is 10 kilometers per hour so train B will cover 50 kilometers in 5 hours.

They will be at same place after 5 hours.

Hence if the speed of train A is 90 kilometers per hour and the speed of train B is 100 kilometers per hour then after 5 hours they will be in the same place.

Learn more about speed at brainly.com/question/4931057

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What is the product (2x + 3y) (7x – 4y)?

cupoosta [38]

Answer:

14x²-12y²

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

How are fractions and decimals related?

Savatey [412]

Fractions and decimals are related in a very close way. Ways such as they are both representing a whole number.

for example

1/2 , 0.5 , 50%

all three numbers have the same value but are expressed in a different format. all three represent the same whole number.

another example would be

1/4 , 0.25 , 25%

hopefully this helped. and or makes sense.

LET ME KNOW :p

7 0

3 years ago

Someone help with this problem and the other ones if you can!!!!

SOVA2 [1]

Answer:

sorry i cant I really need the points tho

8 0

3 years ago

The population of a community is known to increase at a rate proportional to the number of people present at time t. If the popu

Lady bird [3.3K]

Answer:

$P(t) = P(0)e^{0.0693t}$

Step-by-step explanation:

The population of a community is known to increase at a rate proportional to the number of people present at time t.

This means that the population growth is modeled by the following differential equation:

$\frac{dP(t)}{dt} = rP(t)$

Which has the following solution:

$P(t) = P(0)e^{rt}$

In which P(t) is the population after t years, P(0) is the initial population and r is the growth rate.

The population has doubled in 10 years

This means that $P(10) = 2P(0)$ . We use this to find r.

$P(t) = P(0)e^{rt}$

$2P(0) = P(0)e^{10r}$

$e^{10r} = 2$

$\ln{e^{10r}} = \ln{2}$

$10r = \ln{2}$

$r = \frac{\ln{2}}{10}$

$r = 0.0693$

So the equation that will estimate the population of the community in t years is:

$P(t) = P(0)e^{0.0693t}$

6 0

3 years ago

What is the slope of the line passing through the points (–1, 3) and (4, –7)?

Nataliya [291]

Slope=rise/run
slope=(y2-y1)/(x2-x1) if you have the points
(x1,y1) and (x2,y2)

we have the points (-1,3) and (4,-7)
x1=-1
y1=3
x2=4
y2=-7

slope=(-7-3)/(4-(-1))=-10/5=-2

answer is D

6 0

3 years ago