1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Flauer [41]
3 years ago
7

A plane traveled from California and back. It took one hour longer on the way out than it did on the way back. The plane's avera

ge speed out was 300 mph. The average speed on the way back was 350 mph. How many hours did the trip out take?
A. 8 hours
B. 6 hours
C. 7 hours
D. 13 hours
Mathematics
2 answers:
Yakvenalex [24]3 years ago
8 0
I would want to say c), but im not 50% sure. hope this helps :)
padilas [110]3 years ago
5 0

Answer:

Option D is the correct answer.

Step-by-step explanation:

Let x be the one way distance and t be the time out.

Time taken for back = t-1

We have plane's average speed out was 300 mph and average speed on the way back was 350 mph.

That is

           \frac{x}{300}=t\texttt{ and }\frac{x}{350}=t-1

Dividing both equations

             \frac{\frac{x}{300}}{\frac{x}{350}}=\frac{t}{t-1}\\\\350t-350=300t\\\\t=7\texttt{ hours}

Time taken for back = t-1 = 7-1 = 6 hours.

Total time taken = 7 + 6 = 13 hours

Option D is the correct answer.

You might be interested in
Help help help help thanks lol
riadik2000 [5.3K]
f(x)=x^2-81\\
y=x^2-81\\
x^2=y+81\\
x=\pm \sqrt{y+81}\\
f^{-1}(x)=\pm \sqrt{x+81}\\

f(x)=2x-6\\
y=2x-6\\
2x=y+6\\
x=\dfrac{1}{2}y+3\\
f^{-1}(x)=\dfrac{1}{2}x+3\\
f^{-1}(2)=\dfrac{1}{2}\cdot2+3\\
f^{-1}(2)=1+3\\
f^{-1}(2)=4
5 0
3 years ago
of the 50 fish that jim caught from the lake 14 were trout. the estimated population of the lake is 7,500 fish.about how many tr
Mariulka [41]
It would be estimated about 2,100 trouts I would say, since 7,500 divided by 50 is 150 so 150 x 14 = 2,100 trouts :)
6 0
3 years ago
Prove the following limit. lim x → 5 3x − 8 = 7 SOLUTION 1. Preliminary analysis of the problem (guessing a value for δ). Let ε
Temka [501]

\displaystyle\lim_{x\to5}3x-8=7

means to say that for any given \varepsilon>0, we can find \delta such that anytime |x-5| (i.e. the whenever x is "close enough" to 5), we can guarantee that |(3x-8)-7| (i.e. the value of 3x-8 is "close enough" to the limit value).

What we want to end up with is

|(3x-8)-7|=|3x-15|=3|x-5|

Dividing both sides by 3 gives

|x-5|

which suggests \delta=\dfrac\varepsilon3 is a sufficient threshold.

The proof itself is essentially the reverse of this analysis: Let \varepsilon>0 be given. Then if

|x-5|

and so the limit is 7. QED

8 0
3 years ago
4 lbs 7 oz; oz<br> conversions ratios thing
bogdanovich [222]

Answer:

4 lb 7 oz = 71 oz

Step-by-step explanation:

Do you need to convert 4 lb 7 oz into oz?

If so, do the following.

Obviously, 7 oz is already in oz, so all you need to do is convert 4 lb into oz and then add 7 oz.

1 lb = 16 oz

For every lb, there are 16 oz. To convert lb to oz, multiply the number of lb by 16.

4 lb = 4 * 16 oz = 64 oz

4 lb 7 oz = 4 lb + 7 oz = 64 oz + 7 oz = 71 oz

4 0
3 years ago
3n-5p+2n=10 solve for n
nikdorinn [45]

Answer:

n=3p

Isolate the variable by dividing each side by factors that don't contain the variable.

5 0
2 years ago
Read 2 more answers
Other questions:
  • James has a job with a current salary of $42,000. He wants to earn a college degree that will take him 2 years to complete and i
    15·2 answers
  • It's okey if you use a calculator :)
    6·2 answers
  • a local park has a swimming pool that is 12m wide, 17m long, 3m deep. what is the volume of a swimming pool
    7·1 answer
  • Isaac and Victoria share money in the ratio 2 : 5 Victoria recieve £6.60
    12·1 answer
  • Please help me with.<br><br> image attached.
    14·1 answer
  • Right 20 7 and 500/22000 in decimal form
    13·2 answers
  • What is the volume of this composite solid?<br> 2 m<br> 8 m<br> 3 m<br> 5 m
    14·2 answers
  • For each set of points below, determine the distance between them
    15·2 answers
  • Help please.. i need this answer ASAP
    8·2 answers
  • This pattern follows the rule add 9. What are the next 3 terms?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!