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
Arlecino [84]
3 years ago
12

A pencil costs $0.25 more than an eraser. If the cost of eight pencils is $6.80, what is the cost of one eraser?

Mathematics
2 answers:
Llana [10]3 years ago
8 0

Answer:

A single pencil costs $0.85 and a single eraser costs $0.60

lora16 [44]3 years ago
5 0

Answer: The cost of one eraser is $0.6

Step-by-step explanation:

When solving this problem, it's best to set up a system of equations. Let pencil = p and eraser = e.

p = $0.25 + e

8p = $6.80

Now, we can use the second equation to solve for p by dividing both sides by 8. 6.8/8 = 0.85. Therefore, p = $0.85.

Then, use the value of p to find e by plugging the value of p we just found back into the first equation we wrote. Doing so, we get $0.85 = $0.25 + e.   To solve for e, we must subtract 0.25 from both sides, giving use 0.85-0.25 = 0.6

Therefore e = $0.6, so the cost of one eraser is $0.6 or 60 cents.

You might be interested in
What is the length of the arc if: 11. r=10 n=20 A15(pi)/ 7 B13(pi)/ 5 C16(pi)/ 2 D11(pi)/ 4 E 10(pi)/ 9 F 9(pi)/ 4 12. r=3 n=6 A
Vilka [71]

Step-by-step explanation:

The formula for arc length [for the angle in degrees] is:

L = 2\pi r \left(\dfrac{n}{360}\right)

here,

n = degrees

r = radius

using this we'll solve all the parts:

r = 10, n = 20:

L = 2\pi r \left(\dfrac{n}{360}\right)

L = 2\pi (10) \left(\dfrac{20}{360}\right)

from here, it is just simplification:

2 and 360 can be resolved: 360 divided by 2 = 180

L = \pi (10) \left(\dfrac{20}{180}\right)

10 and 180 can be resolved: 180 divided by 10 = 18

L = \pi \left(\dfrac{20}{18}\right)

finally, both 20 and 18 are multiples of 2 and can be resolved:

L = \pi \left(\dfrac{10}{9}\right)

L = \dfrac{10\pi}{9} Option (E)

r=3, n=6:

L = 2\pi r \left(\dfrac{n}{360}\right)

L = 2\pi (3) \left(\dfrac{6}{360}\right)

L = \dfrac{\pi}{10} Option (D)

r=4 n=7

L = 2\pi r \left(\dfrac{n}{360}\right)

L = 2\pi (4) \left(\dfrac{7}{360}\right)

L = \dfrac{7\pi}{45} Option (C)

r=2 n=x

L = 2\pi r \left(\dfrac{n}{360}\right)

L = 2\pi (2) \left(\dfrac{x}{360}\right)

L = \dfrac{x\pi}{90} Option (D)

r=y n=x

L = 2\pi r \left(\dfrac{n}{360}\right)

L = 2\pi (y) \left(\dfrac{x}{360}\right)

L = \dfrac{xy\pi}{180} Option (E)

6 0
3 years ago
9x = 63 what is x<br> <img src="https://tex.z-dn.net/?f=9x%20%3D%2063" id="TexFormula1" title="9x = 63" alt="9x = 63" align="abs
tankabanditka [31]

Answer:

x = 7

Step-by-step explanation:

Please give me brainliest :)

5 0
2 years ago
Suppose there are n people on a bus. At the next stop, 9 more people get on the bus. No one gets of the bus. Draw a bar diagram
nordsb [41]

Answer:

Algebaric Expression & Bar Diagram graphic representation of number of people in bus.

Step-by-step explanation:

No. of people on bus = n

After 9 more boarding & no one deboarding the bus , no. of people = n + 9

Bar diagrams is graphical method for presentation of data. Presenting the given in bar diagram :

7 0
2 years ago
Please help me! thank you so much if you do! i highly appreciate it!!!
Len [333]

Answer:

a. 20%

b. 130 mg

c. 7.7 ounces

Step-by-step explanation:

a. Next to saturated fats it says 20%

b. 1000*0.13 is 130

c. 1000 divided by 130 is 7.69 rounded is 7.7

Hope this helps!

6 0
3 years ago
The sum of the measures of the interior angles of a triangle is 180 degrees.
Arlecino [84]
The answer is True(a).
6 0
3 years ago
Read 2 more answers
Other questions:
  • Jane sold 5 cakes on Monday 8 cakes on Tuesday and 7 cakes on Wednesday 3/5 of all the cakes she sold were chocolate cakes work
    12·1 answer
  • 6 divided by 9.51 plz help me
    8·1 answer
  • What values of b make it an exponential growth function
    13·2 answers
  • Find the distance between the points given.<br><br> (-10, 3) and (-10, 12)<br><br><br> 9<br><br> 15
    7·2 answers
  • What is the most precise name for a quadrilateral with the following vertices:
    12·1 answer
  • An internet book company charges $7 for each paperback plus $2.75 for shipping and handling per order
    14·1 answer
  • Select the correct answer.
    8·2 answers
  • What is 1/10 of 3,000?
    11·1 answer
  • Which expression is equivalent to 24 + 20​
    12·1 answer
  • Someone help please thank you
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!