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]
4 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]4 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
Name the multiplicative identity of -12i
ycow [4]

Answer:

0

Step-by-step explanation:

4 0
3 years ago
What is the perimeter of an equilateral triangle if one side is 4
Sholpan [36]
Is it multiple choice
4 0
3 years ago
Find the volume of a sphere with a diameter of 20 inches
trasher [3.6K]

Answer:

V≈4188.79in³    

Step-by-step explanation:

4.188.79in3

7 0
3 years ago
3x+3=18 answer please
UkoKoshka [18]
3x + 3 = 18

First, subtract 3 from both sides. / Your problem should look like: 3x = 18 - 3
Second, simplify 18 - 3 to 15. / Your problem should look like: 3x = 15
Third, divide both sides by 3. / Your problem should look like: x = \frac{15}{3}
Fourth, simplify \frac{15}{3} to 5. / Your problem should look like: x = 5

Answer: x = 5

8 0
3 years ago
Read 2 more answers
Solve the following
Yuki888 [10]

Answer:

1) 199

2) 899

Step-by-step explanation:

1)

The 2-digit number is the number formed from unit-digit and ten-digit

∵ The greatest digit is 9

→ To form the greatest 2-digit number use 9 as ten-digit and unit-digit

∴ The greatest 2-digit number is 99

The 3-digit number is the number formed from unit-digit, ten-digit, and hundred-digit

∵ The smallest digit is 0

→ To form the smallest 3-digit number use 0 as ten-digit and unit-digit,

   we can not use 0 for the hundred-digit so use 1 as hundred-digit  

∴ The smallest 3-digit number is 100

∵ The sum of them = 99 + 100

∴ Their sum is 199

2)

→ To form the greatest 3-digit number use 9 as hundred-digit, ten-digit,

   and unit-digit

∴ The greatest 3-digit number is 999

∵ The smallest 3-digit number is 100

∵ The difference between them = 999 - 100

∴ The difference between them = 899

7 0
3 years ago
Other questions:
  • Please help! I don't understand!
    13·1 answer
  • PLEASE HELP..................
    15·1 answer
  • The fraction 4/5 is equivalent to 0.8 and to 80%. How do I write 0.8 and 80% as unreduced fractions.
    14·2 answers
  • The function f (x )equals 1000 (0.5 )Superscript StartFraction x Over 30 EndFraction describes the​ amount, f(x), in​ kilograms,
    7·1 answer
  • HELP PEASE I WILL MARK BRAINLIEST ASAP !!!
    9·1 answer
  • What is m∠C?<br><br><br><br> Enter your answer in the box.<br><br> m∠C= °
    7·1 answer
  • Help me Please!!!!!!!!!!
    10·1 answer
  • Classify by it’s sides then determine if the triangle is a right triangle.
    12·1 answer
  • Pls help do this for me
    11·1 answer
  • The volume of a cylinder that is 6 meters in diameter and 60 centimeters high is ________.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!