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
Which are solutions of the equation 4x2 – 7x = 3x + 24? Check all that apply.
SCORPION-xisa [38]

Answer:

{-3/2, 4}

Step-by-step explanation:

Use synthetic division here.  If the remainder is 0, then the divisor is a root or solution.

Here we have x = -4.  Perform the synthetic division as follows:

-4       4     -10    -24

                 -16     108

------------------------------

          4      -26     84              The remainder is 84, which tells us -4 is NOT

                                                a root/solution.

Try -3/2 as divisor this time:

-3/2    4     -10    -24

                   -6    24

------------------------------

          4      -16       0            Remainder is 0, so -3/2 is a solution

Show in the same manner that 4 is a solution also.  Or determine whether x - 4 satisfies 4x - 16 = 0 (it does).

8 0
3 years ago
Read 2 more answers
Express the null hypothesis and the alternative hypothesis in symbolic form that would be used for a hypothesis test. A psycholo
deff fn [24]

Answer:

Null Hypothesis

                 H₀ :  P = 3.8

Alternative Hypothesis

                 H₁: P > 3.8

Step-by-step explanation:

<u><em>Explanation</em></u>:-

<u><em>Null Hypothesis</em></u> :-

 The single statistic, H₀ will be that the sample statistic

H₀ : There is does not differ significantly from hypothetical parameter values

H₀ :  P = 3.8

<u><em>Alternative Hypothesis:</em></u>

The statistic , H₁ will be the sample statistic

H₁: There is  differ significantly from hypothetical parameter values

H₁: P > 3.8

7 0
3 years ago
12 of 18
melisa1 [442]

Answer:

3x+3y and distributive property

Step-by-step explanation:

It is given that

Gretchen buys three bags of apples = 3X

Hayley buys three bunches of bananas = 3Y

As it is also mentioned that it first it is multiplied and then it is added

So, the expression for determining the total number of fruit pieces is

3X + 3Y

And, this expression denotes the distributive property in which we multiplied the each variable and then added it

7 0
3 years ago
John bought two 5 pounds bags of candy to share with classmates. If there are 25 students in john's class, how much candy will e
SpyIntel [72]
0.2 pounds       amount of candy/number of students
7 0
3 years ago
5. Half of 18 <br>helppp​
Serggg [28]
Use photo mathhhhhh‍♀️
7 0
3 years ago
Other questions:
  • Math scores on the SAT exam are normally distributed with a mean of 514 and a standard deviation of 118. If a recent test-taker
    10·1 answer
  • How does poetry play an important role in mathematics?
    15·1 answer
  • A small cargo plane currently has 145 pounds of cargo aboard. In addition, n boxes weighing 50 pounds each will be brought aboar
    15·1 answer
  • the cost per month of one cell phone plan is $30 plus and additional nickel for each text. write an equation that defines the to
    5·1 answer
  • The scatter plot shows the relationship between the number of car accidents in a month and the number of drivers attending a pro
    13·1 answer
  • I have to write the slope and equation of each line pictured in y = mx + b form.
    12·1 answer
  • Solve this <br> 6x+7=8x−15
    12·2 answers
  • Solve for x in the diagram below
    5·1 answer
  • Identify A, B and C for the following equation: 5y = 15x -90
    8·1 answer
  • Erin is comparing two rental car companies for an upcoming trip. The function
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!