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
timofeeve [1]
3 years ago
5

At a local store, kelly and martin bought some notebooks and pencils. Kelly bought 4 notebooks and 25 pencils for 16.71. Martin

bought 6 notebooks and 20 pencils for 21.74 what is the cost of 1 notebook and 5 pencils
Mathematics
1 answer:
Nat2105 [25]3 years ago
6 0
Let n = cost of 1 notebook
Let p = cost of 1 pencil

Then,

3n + 4p = 8.5
5n + 8p = 14.5

You can solve for one variable in terms of the other and then substitute into the remaining equation.

3n + 4p = 8.5
+ 5n + 8p = 14.5

Multiply the top equation by -2 so that the p-containing terms cancel each other out:

-2(3n + 4p = 8.5)
+ 5n + 8p = 14.5
-n + 0 = -2.5

So after dividing both sides by -1, we see that n = $2.5. Plugging into the first equation gives p = $0.25.


3n + 4p = 8.5
5n + 8p = 14.5
You might be interested in
Please help this is due and i only got the second part done
Ainat [17]

Answer:2n+13=75 n=31

8 0
2 years ago
If 75% of the students in Toby's grade voted, how many students are in Toby's grade?
kupik [55]

Answer:

HOW SHOULD WE KNOW WE DONT HAVE ANY INFORMATION EXCEPT 75% AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

Step-by-step explanation:

3 0
3 years ago
Help pls I really need it pls
Marianna [84]
The value of x is 7 because 8/24 = 1/3 so find 1/3 of 21
4 0
2 years ago
A 4ft by 5ft dock is anchored
Salsk061 [2.6K]
The area of the dock is 20ft
8 0
3 years ago
Complete the square to put () in vertex form. () = 3<br> 2 + 30 − 12. What is the vertex?
gulaghasi [49]

Answer:

A and A

the equation of a parabola in vertex form is

y = a(x - h)² + k

where ( h, k ) are the coordinates of the vertex and a is a multiplier

y = - 2(x + 3)² + 2  is in this form

with vertex = ( - 3, 2)

To find the y-intercept let x = 0

y = - 2(3)² + 2 = - 18 + 2 = - 16

Similarly

y = - 2(x + 2)² + 2 is in vertex form

vertex = ( - 2 , 2)

x = 0 : y = - 2(2)² + 2 = - 8 + 2 = - 6 ← y- intercept

hope this helped

8 0
2 years ago
Other questions:
  • What is m What is m What is m
    8·1 answer
  • Rhett made $250 washing cars with his mobile car wash company. He charges $70 per car and earned $50 in tips. Write an equation
    13·2 answers
  • Which of the following expressions are equivalent to 4+(14-2)4+(14−2)4, plus, left parenthesis, 14, minus, 2, right parenthesis?
    13·2 answers
  • Anyone Who UNDERSTANDS THIS??????
    5·1 answer
  • The base of a triangle is x cm and its height is (x-7) Write down the expression of the triangle
    11·2 answers
  • Solve 6 &lt; x + 5 &lt; 11 ​
    7·1 answer
  • Can a triangle have side lengths 3,13, and 7
    15·1 answer
  • The histogram below shows cell phone data usage in megabytes (Mb).
    10·1 answer
  • you went to a coffee house with 2 friends and ordered an iced coffee and dessert which came to $12.96 how much is the tip if the
    9·1 answer
  • Pls help ASAP! GIVING 100 POINTS FOR THE RIGHT ANSWERR!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!