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
S_A_V [24]
2 years ago
12

The total cost of 1 pencil and 2 erasers is £8, and the total cost of 2 pencils and 4 erasers is £20, as shown below:

Mathematics
1 answer:
Paul [167]2 years ago
8 0

Answer:

see explanation

Step-by-step explanation:

The 2 equations are

x + 2y = 8 → (1)

2x + 4y = 20 → (2)

You might be interested in
What is 7.25-6.17=? in subtracting decimals
Aleks04 [339]

Answer:

1.08

Step-by-step explanation:

5 0
3 years ago
At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party?
Gnoma [55]

There would be 12 people at the party!

In general, with n+1 people, the number of handshakes is the sum of the first n consecutive numbers: 1+2+3+ ... + n.

Since this sum is n(n+1)/2, we need to solve the equation n(n+1)/2 = 66.

This is the quadratic equation n2+ n -132 = 0. Solving for n, we obtain 11 as the answer and deduce that there were 12 people at the party.

Since 66 is a relatively small number, you can also solve this problem with a hand calculator. Add 1 + 2 = + 3 = +... etc. until the total is 66. The last number that you entered (11) is n.

Hope this helps!

3 0
3 years ago
Read 2 more answers
How can you generate x-3y+5 from the expression x+y+4+2y+1
vladimir2022 [97]

Answer: Here is the explanation. also it it +3y not -3y

Step-by-step explanation:

x+y+4+2y+1=x+3y+5 because

2y+y=3y

so now you have x+3y+4+1

4+1=5

now you have: x+3y+5

if you do not understand, What i am trying to say is, you need to add all of the same things.

3 0
3 years ago
What is the correct answer?​
alexgriva [62]
I think it is 5.64 I hope this helps
8 0
3 years ago
Write 72% as a fraction in simplest form.
vladimir2022 [97]
The answer to your question is 18/25
6 0
2 years ago
Read 2 more answers
Other questions:
  • 30p question
    9·2 answers
  • The function f(x) = 1/2 x + 2 is changed to f(x) = − 1/2 x + 2. Which describes the effect of the change on the graph of the ori
    5·1 answer
  • Recall that two angles are complementary if the sum of their measures is​ 90°. Find the measures of two complementary angles if
    6·1 answer
  • • Which multiplication expression is equivalent to
    12·2 answers
  • Is 3/5 greater then 3/6
    9·1 answer
  • Which decimal is greater 0.7 or 0.07?
    15·2 answers
  • HELPPPPPPPPPPP PLEASEEEE THIS IS DUE IN 30 MINS
    15·1 answer
  • I’ll give the Brainliest to whoever answers this question with a reasonable explanation.
    14·1 answer
  • Describe the event as impossible, unlikely, equally likely, likely, or certain.
    14·2 answers
  • HELP <br> Write an equation of the line in slope intercept form using the graph below.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!