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
Mnenie [13.5K]
3 years ago
11

if a car uses 1/3 of a tank of petrol on the first part of the journey then 2/5 of a tank of petrol on the second part on the jo

urney and has 8 litres how many litres of petrol did it have before the journey
Mathematics
1 answer:
Ainat [17]3 years ago
8 0
We assume the petrol tank was full at the beginning of the journey.

The petrol tank holds x litres.

x - 1/3 x - 2/5 x = 8

15x/15 - 5x/15 - 6x/15 = 8

4x/15 = 8

4x = 120

x = 30

The petrol tank holds 30 litres.
You might be interested in
A line includes the points (3,4)and (6,10). What is its equation in slope- intercept form
chubhunter [2.5K]
10-4=6. 6-3=3
6÷3 =2. Slope is positive and equals 2
3 0
3 years ago
State if the two triangles are congruent. If they are, state how you know.
ankoles [38]

Answer:

Step-by-step explanation:

yes congruent, by AAS

the angles are stating , w/ the little red lines that they are the same.. so we know two angles of the triangles are the same, and we also know that one side touching is the same.   so yes.. AAS.  

6 0
3 years ago
Write the equation of the line that passes through the points (2, 1) and (-8, -8).
wariber [46]

Answer:

Step-by-step explanation:

Find the distance between the given points: (-7, 5) and (-8, 4)

6 0
3 years ago
What is the formula for pie
Amanda [17]

Answer:

3.14

Step-by-step explanation:

8 0
3 years ago
The length of a rectangle is 5 less than 3 times its width. The perimeter is
My name is Ann [436]

Answer:

The length is 28 and the width is 11

Step-by-step explanation:

To solve this problem, we can make the width as x.

Since the length is 5 less than 3 times the width, it's going to be 3x - 5

So now we've got the length and width, just need to find the perimeter, which is all the sides added up together. They already gave us the perimeter, so we just have to solve the equation:

2(3x - 5) + 2x = 78

6x - 10 + 2x = 78

8x - 10 = 78

8x = 88

x = 11

x = 11, but remember, x is the width, not the length. Since we already found what x is, we just have to plug it into the equation of:

3x - 5

3 × 11 - 5

33 - 5 = 28

Answer: Length = 28 (don't forget to add the unit if there is one)

8 0
2 years ago
Other questions:
  • During the day, the manager of the meat department sold 15.4 pounds of hamburger to one customer and 13.22 pounds to another cus
    13·1 answer
  • 2x+3y=9 x+5y=8<br><br> solving systems using elimination solve and show your work thank you
    15·1 answer
  • The temperature outside an airliner was -50 f this was 110 degrees f less than the temp in the ground write an equation to repre
    9·1 answer
  • How many solutions exist for the given equation? StartFraction one-half left-parenthesis x plus 12 right-parenthesis equals 4 x
    7·2 answers
  • The sum of 1/11 and 1/15 is closest to....
    6·2 answers
  • Does it matter which way you subtract the values when you are finding the distance between two numbers on a number line? Give ex
    7·1 answer
  • What is the area of the triangle
    6·2 answers
  • Four more than 5 times a number​
    10·2 answers
  • What is the value of m?<br><br> 0.61m−1.51m=9<br><br> Enter your answer in the box.<br><br> m =
    13·2 answers
  • Factor this polynomial completely.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!