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
Gwar [14]
3 years ago
7

The cost of a pen is 3 times the cost of a pencil and cost of a

Mathematics
1 answer:
valentinak56 [21]3 years ago
6 0

Answer:

1 Pen cost $2.25

Step-by-step explanation:

Assume:

Cost of Pen = a

Cost of pencil = b

Cost of notebook = c

a = 3b   -------------------(1)

c = 4a   -------------------(2)

2a + 6b + c = $18 -----(3)

From equation (1), b = a ÷ 3 ---------(4)

Substitute equations (2) and (4) in equation (3)

2a + 6 * (a ÷ 3) + 4a = $18

2a + 2a + 4a = $18

8a = $18

a = $2.25

Therefore, 1 Pen cost $2.25

You might be interested in
Angle M and Angle N are vertical angles. The measure of Angle M is 3x – 18. The measure of Angle N is x + 30.
torisob [31]

Answer:

24 = x

54° = Measure\:of\:Angle\:N

54° = Measure\:of\:Angle\:M

Step-by-step explanation:

Vertical Angles are congruent, so set the two expressions equal to each other:

[x + 30]° = [3x - 18]°

-[3x]° - [3x]°

___________

−18° = 30° - [2x]°

- 30° - 30°

____________

−48° = [−2x]°

____ ___

−2° −2°

24° = x [Plug this back into both expressions to get both <em>m</em>∠<em>N</em> and <em>m</em>∠<em>M</em> at 54°.]

I am joyous to assist you anytime.

5 0
3 years ago
Find the equation of the line that is parallel to the given line and passes through the given point. y = 4(x + 4); ( 2 3 , 2 3 )
luda_lava [24]

Answer: the equation is y=43x+4

Step-by-step explanation:

mark me brainliest

7 0
2 years ago
Draw and label point W. Draw and label line XY. Draw and label a plane K
mafiozo [28]

Answer:

b a pex

Step-by-step explanation:

3 0
3 years ago
Find the mean absolute deviation
pantera1 [17]
First find the mean (sum divided by number of values)
4+5+8+10+15=42
42/5=8.4
Then find the difference between each of the numbers and the mean.
4.4, 3.4, 0.4, 1.6, 6.6
Then find the mean of those values.
4.4+3.4+0.4+1.6+6.6=16.4
16.4/5=3.28
Final answer: 3.28
6 0
3 years ago
Read 2 more answers
Ben is taking a typing class, and the following line graph represents the number of words per minute he was able to type each we
Crank
During week 2, he could type 15 words per minute, at his fourth week, he could type 30. So 30-15=15. He could type 15 words faster on week 4 than he could at week 2.
3 0
3 years ago
Other questions:
  • How do I write this in algebraic notation.
    9·1 answer
  • Which exspression is equivalent to 8 divided by 6
    11·1 answer
  • Help pleaseeeeeeeeeeeeeeeeeeeeeee
    12·2 answers
  • Which ones are rational and which are irrational?
    12·1 answer
  • Your teacher will grade your response for questions 21–23 to ensure you receive proper credit for your answer.
    11·1 answer
  • Simplify<br> (8^2)^3<br><br> I thought it was 8^5 of five but I might be wrong
    5·1 answer
  • Help 15 points for the answer
    15·1 answer
  • 3x + 2 &gt; 29 is x &gt; 9 right? or is it x &gt; 27? please help
    11·1 answer
  • From the set {24, 36, 72}, use substitution to determine which value of x makes the inequality true. A. 72 B. 36 C. none of thes
    12·1 answer
  • Mr. Edwards bought a 50-pound bag of flour for his bakery. It was equally divided among 6 days. How much flour was used per day?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!