3 years ago

A train travels 91 kilometers in 2 hours, and then 97 kilometers in 3 hours. What is its average speed?

Mathematics

1 answer:

Andrei [34K]3 years ago

6 0

I think the average spend is 11 km. i don't know for sure..

You might be interested in

What problem makes 49

torisob [31]

45 + 4 makes 49 if that counts

6 0

3 years ago

Select the correct volume.

Bond [772]

Answer:

i think it is 8/125

Step-by-step explanation:

slect B

6 0

3 years ago

Find the volume of the following solid. The solid between the cylinder f(x,y)equals=e Superscript negative xe−x and the region

PilotLPTM [1.2K]

It is hard to comprehend your question. As far as I understand:

f(x,y) = e^(-x)

Find the volume over region R = {(x,y): 0<=x<=ln(6), -6<=y <= 6}.

That is all I understood. It would be easier to understand with a picture or some kind of visual aid.

Anyways, to find the volume between the surface and your rectangular region R, we must evaluate a double integral of f on the region R.

$\iint_{R}^{ } e^{-x}dA=\int_{-6}^{6} \int_{0}^{ln(6)} e^{-x}dx dy$

Now evaluate,

$\int_{0}^{ln(6)}e^{-x}dx$

which evaluates to, 5/6 if I did the math correct. Correct me if I am wrong.

Now integrate this w.r.t. y:

$\int_{-6}^{6}\frac{5}{6}dy = 10$

So,

$\iint_{R}^{ } e^{-x}dA=\int_{-6}^{6} \int_{0}^{ln(6)} e^{-x}dx dy = 10$

7 0

3 years ago

What type of polynomial is 2x+10

Romashka-Z-Leto [24]

AnswerAnswer:

Binomial

Step-by-step explanation:

there are 2 terms

Have a great day!

If it helped mark me as brainliest!

6 0

2 years ago

Read 2 more answers

Select the number of solutions for each system of two linear equations.

lidiya [134]

Answer:

work is shown and pictured

4 0

3 years ago