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
goldfiish [28.3K]
3 years ago
8

The cost of petrol rises by 2 cents a liter. last week a man bought 20 liters at the old price. This week he bought 10 liters at

the new price. Altogether, the petrol costs $9.20. What was the old price for 1 liter? 34 POINTS I MARK BRAINLIEST!
Mathematics
1 answer:
AVprozaik [17]3 years ago
8 0

Answer:

We suppose that a is the old price in cents

the total cost of 9.20 $ equals 920 cents

so we have 20 liters bought with the old price (a) and 10 liters with the new price (a + 2). This is translated into this equation where a is the old price therefore our quest to be answered

20 xa + 10 x (a + 2) = 920 (cents)

20 xa + 10 xa + 20 = 920

30 xa + 20 = 920

30 xa = 920 - 20

30 xa = 900

a = 900: 30

a = 30 (cents)

therefore the old price for 1 liter of petrol is 30 cents

(hope this helps can i plz have brainlist :D hehe)

Step-by-step explanation:

You might be interested in
What is the value of 3 minus (negative 2)?
earnstyle [38]

Answer:

5

Step-by-step explanation:

3-(-2) will become positive 5. so number line will go towards positive 5.

5 0
2 years ago
Megan and her sister are planning their
Yuri [45]

Answer:  y = 12.50x + 45

Step-by-step explanation:

if x is the number of hours  and you pay $12.50 per hour then we can come up the expression 12.50x

You will be charge $45 as an initial fee so it will be 12.50x + 45 and that has to equal the total cost which is y.

y = 12.50x + 45

7 0
3 years ago
What's the length of the missing leg?<br><br>​
ValentinkaMS [17]

Answer:

<h2><u><em>10</em></u></h2>

Step-by-step explanation:

<h2>you have to multiply 5 x 4 and then divide by 2 because that the formula for a triangle.</h2>
7 0
3 years ago
Please Help! Freshman in Highschol for Algebra 1​
Andrei [34K]

Answer:

Disagree 15 minutes

Step-by-step explanation:

3 0
3 years ago
Find the common difference of the arithmetic sequence 3, -2, -7
svlad2 [7]

Answer:

-5

Step-by-step explanation:

To find the common difference, take the second term and subtract the first term

-2 - 3 = -5

Check with the third term and the second term

-7 - (-2) = -7 +2 = -5

The common difference is -5

4 0
3 years ago
Other questions:
  • S = 2r + 3 × solve for x
    13·1 answer
  • Admission to a baseball game is $2.50 for general admission and $5.00 for reserved seats. The receipts were $2882.50 for 876 pai
    9·1 answer
  • What is the perimeter of this pentagon?
    8·1 answer
  • 3.<br> QR<br> find the arc length<br> 02.83<br> 021.99<br> O 12.57<br> 0 34.56
    13·1 answer
  • How are angle 6 and angle 2 related?
    9·2 answers
  • Someone please help me
    10·1 answer
  • Factor this expression, 3n^2+9n+6 If is possible
    13·1 answer
  • HELPP ME PLEASE ITS DUE TODAYY!!!!!
    7·2 answers
  • 1/500 as a percentage
    8·2 answers
  • Answers for the 2 boxes please ​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!