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
An art teacher mixes 20 ounces of yellow paint with 8 ounces of red paint. How many ounces of yellow paint would she need to mix
vlada-n [284]
30. Answer if u place the equation into a fraction: example 20/8 yellow over red. Next let’s put the other amount into a fraction, we don’t know yellow so for the fraction we will put x: x/18. For our next step we will then cross multiply 20 by 18 and 8 by x getting 8x=360 from there you divide for x getting 45 yellow.
7 0
3 years ago
All of the following fractions are equal to
Studentka2010 [4]

Answer:

Except 4 out of 6

the answer is the third one

8 0
2 years ago
Read 2 more answers
What is the approximate area of the circle shown?
Amanda [17]

Answer:

907.46

Step-by-step explanation:

We know the area of a circle is:

\pi r^{2} \\\pi (34/2)^{2}\\17^{2} \pi \\907.46

5 0
2 years ago
What is the common denominator as a fraction of 5/4 and 11/16
trasher [3.6K]
16 is the greatest common denominator
7 0
3 years ago
Read 2 more answers
BRAINLIEST FOR CORRECT ANSWER PLEASE HELP ASAP
bezimeni [28]

Answer:

A is the correct point;)

5 0
2 years ago
Read 2 more answers
Other questions:
  • Students in 7th and 8th grade were asked the types of movies they prefer. The results of the survey are shown in the two-way tab
    6·2 answers
  • 1. A college newspaper, The College Spy, has a fixed production cost of $70 per edition and it costs 40¢ per copy to print and d
    15·1 answer
  • THE BRAINIEST ANSWER Opportunity!
    11·1 answer
  • The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club. She would now like to det
    10·1 answer
  • PLEASE HELP....... Solve the system of equations using the Addition method. 2a + 3b = -1 3a + 5b = -2
    5·1 answer
  • The bird population in Louisiana is decreasing at a rate of 15% per day due to the oil spill. If there are 12,000 birds today, h
    14·1 answer
  • Choose all that correctly describe bivariate data on a residual plot.
    14·1 answer
  • if A and B are overlapping subset of a universal set U,write the relation between n(U), n(A U B) and (A U B) compliments​
    14·1 answer
  • Round <br> 0.99999999<br> to four decimal places?
    5·1 answer
  • 50 POINTS AND BRAINLIEST IF IT INCLUDES STEPS
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!