answer.
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
satela [25.4K]
2 years ago
9

Three erasers and five pencils cost $7.55. 6 erasers and 12 pencils cost $17.40. How much does 1 eraser cost? How much does 1 pe

ncil cost?
Mathematics
1 answer:
Sphinxa [80]2 years ago
7 0

Answer:

Step-by-step explanation:

erasers=e  

pencils=p

3e+5p=7.55   ...(1)

6e+12p=17.40

divide by 2

3e+6p=8.70  ...(2)

(2)-(1) gives

p=8.70-7.55=1.15

from (1)

3e+5(1.15)=7.55

3e+5.75=7.55

3e=7.55-5.75

3e=1.80

e=1.80/3=0.60

cost of 1 eraser=$0.60

cost of 1 pencil =$1.15

You might be interested in
A city planner is mapping the population of residents in the city. he has enough time to map only a small sample of the populati
Lerok [7]
He would need to sample at least every 100th name to get a best graph.
4 0
2 years ago
Read 2 more answers
What is the factored form of 36x4 – 25?
gladu [14]
36x^4 - 25=(6x^2)^2-5^2=(6x^2-5)(6x^2+5)
8 0
2 years ago
Read 2 more answers
Expand and simplify (k-3)^7
nikklg [1K]
There are a couple of ways you can solve this. You can write it out like
(K-3)(K-3)(K-3)(K-3)(K-3)(K-3)(K-3)
And pretty much use the foil method
Or you can use the binomial theorem (google it if you dont know)
The solution should be:
(K^7) - 21(k^6) + 189(k^5) - 945(k^4) + 2835(k^3) - 5103(k^2) + 5103k - 2187
3 0
2 years ago
Read 2 more answers
What is the total amount of sap trees produced that day? Please tell me ASAP(as soon as possible) because this lesson is due for
gogolik [260]

Answer: 5 gallons


Step-by-step explanation:

There are 3 x's on the graph for 1/4, so 1/4 times 3=3/4

There are 2 x's on the graph for 3/8, so 3/8 times 2=3/4

There are 4 x's on the graph for 5/8, so 5/8 times 4=5/2

There is only 1 x for 1, so it will remain 1.

So if you add these up,

3/4+3/4+5/2+1

6/4+10/4+1

16/4+1

4+1

There is 5 gallons of sap produced that day.

Hope this helped!


3 0
2 years ago
Read 2 more answers
Gina sold 5/8 of a mushroom pizza and 3/4 of an onion pizza to the same family.How much pizza in all did the family buy?
Murrr4er [49]

Answer:

1 and 3/8 of pizza

Step-by-step explanation:

5/8 + 3/4

3/4 x 2 to get the same denominator as 5/8

5/8 + 6/8 = 11/8

11/8 = 1 3/8

6 0
2 years ago
Other questions:
  • Grace claims that the interquartile range of a data set is never equal to its range. Which type of set can be used to prove or d
    10·2 answers
  • Which of the following terms describes the object below?
    8·2 answers
  • The warehouse already has 27 pallets of stock waiting to be unloaded, and the delivery van arrives with another 8. The warehouse
    10·1 answer
  • Find the reciprocal of the expression. 10b/2b + 8
    7·1 answer
  • At a local baseball game there are 3 hot dog vendors. collectively the vendors sold 1,700 hot dogs. if vendor a sold 456, vendor
    12·2 answers
  • Gabriella swims 2 laps per minute. What is the unit rate?
    5·2 answers
  • Below is an attempt to derive the derivative of sec(x) using product rule, where x is in the domain of secx. In which step, if a
    14·1 answer
  • Which represents the solution set to the inequality<br> -1.5(4x + 1) &gt; 4.5 -2.5(x + 1)?
    5·2 answers
  • The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0.4 parts per million (ppm). A consumer h
    5·1 answer
  • Andre is making paper cranes to decorate for a party. He plans to make one large papercrane for a centerpiece and several smalle
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!