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
Sliva [168]
2 years ago
5

Please solve the question and give correct answer with explanation so that i can understand it​

Mathematics
1 answer:
denis-greek [22]2 years ago
6 0

Answer:

  • Yes

Step-by-step explanation:

Let the speed of the car is c and speed of the plane is p.

<h3>We are given:</h3>

The speed of the plane is 7 times the speed of the car

  • p = 7c

The distance traveled is

  • d = 315 km

The time difference to travel this same distance is 3 hours.

<h3>We know that:</h3>
  • d = ts, where d- distance, t- time, s - speed

Find the time for car and plane and their difference.

<h3>Car</h3>
  • t = d/s = 315/c
<h3 /><h3>Plane</h3>
  • t = d/s = 315/p = 315/(7c) = 35/c
<h3 /><h3>The difference</h3>
  • 315/c - 45/c = 3

<u>Solve it for c:</u>

  • (315 - 45)/c = 3
  • 270/c = 3
  • c = 270/3
  • c = 90 km/h

Now find the speed of plane:

  • p = 7c = 7*90 = 630 km/h

As we see, Jenny is right

You might be interested in
Please help. its on ratio ​
a_sh-v [17]
14:7

42:21

6:3

24:12

Hope this helps!
6 0
3 years ago
The price of a cup of coffee was $2.15 yesterday. Today, the price rose $2.30. Find the percentage increase round your answer to
STALIN [3.7K]

Answer:

0.2

Step-by-step explanation:

0.2

3 0
3 years ago
Read 2 more answers
Lorenzo has a checkbook balance of $118.00. He writes two checks, one for $9.00 and one for $84.25. He then deposits $95.00. Fin
natka813 [3]
Hey there!!
So lets do something I like to call "The Process of Elimination".

D is not correct because 118 -95 is not true! Lorenzo DEPOSITED 95.00 which means he added that amount to his balance and not took it away.

B is incorrect because there is no need to divide , here we are simply either taking away money from his current balance or ,we are adding.

C would be incorrect as well, because recall how i said that 95.00 dollars were "deposited" so he would add 95 , and not take it away.

That leaves us with A . Yay.....but wait, not so fast!
Lets double check shall we?

so he had 118,correct? he wrote a check for 9 dollars and 84.25. Keep in mind, that when someone writes a check, there taking money away from there account, which means subtract 9 and 84.25 from 118. 
And then , lets not forget that 95 he deposited.
Deposit means add.

So yes! A is the correct answer!

Hope my explanation helped :)


4 0
4 years ago
Read 2 more answers
Please help me with this
aleksandr82 [10.1K]

Answer:

B.  $19

Step-by-step explanation:

Approximate prices:

1/4 lb ham = 0.25 * $6 = $1.50

1 1/2 lb turkey = 1.5 * $5 = $7.50

1 lb roast beef = $7

3/4 lb bologna = 0.75 * $4 = $3

Add the approximate individual prices:

$1.50 + $7.50 + $7 + $3 = $19

3 0
3 years ago
2loge3 + loge x - loge2 = loge3<br><br> Solve for x
Readme [11.4K]
2\ln 3+\ln x-\ln 2=\ln 3\\&#10;\ln x=-\ln 3+\ln 2\\&#10;\ln x=\ln \dfrac{1}{3}+\ln 2\\&#10;\ln x=\ln \dfrac{2}{3}\\&#10;x=\dfrac{2}{3}
7 0
4 years ago
Other questions:
  • Find the value of x.<br><br> 80<br> 42<br> 60<br> 30
    9·1 answer
  • 50 students are asked if they watched the super bowl and 20 saied yes. Find the pint estimate of proportion of students who watc
    14·1 answer
  • There are 8 students on the minibus. Five of the students
    15·2 answers
  • Can u please answer all three and in 20-30 minutes please or quicker if u can please I just not understanding the math they are
    8·1 answer
  • If you get a 3.1% raise and make 8 dollars an hour now, how much were you getting paid before
    8·1 answer
  • Explain how to find the measurements shown on the protractor. What is the measurement of the angle?
    10·1 answer
  • Using the graph, determine the equation of the axis of symmetry.​
    9·1 answer
  • Y=8x+7 what is the other equation with no solution
    15·1 answer
  • ohn needs to make a scale drawing of his school building for art class. If the building is 256.25 meters long, and John scales i
    10·1 answer
  • Geometry.... ://...<br><br>​help please!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!