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
Len [333]
3 years ago
7

A student bought 3 boxes of pencils and 2 boxes of pens for $6. He then bought 2 boxes of pencils and 4 boxes of pens for $8. Fi

nd the cost of each box of pencils and each box of pens
Mathematics
2 answers:
Annette [7]3 years ago
8 0
Let c and n represent the numbers of pencil and pen boxes, respectively
.. 3c +2n = 6.00
.. 2c +4n = 8.00

You can halve the second equation and subtract it from the first to get
.. (3c +2n) -(c +2n) = 6.00 -4.00
.. 2c = 2.00
.. c = 1.00

Then
.. 1.00 +2n = 4.00 . . . . . half the original second equation with c filled n
.. 2n = 3.00
.. n = 1.50

A box of pencils costs $1.00; a box of pens costs $1.50.
Vedmedyk [2.9K]3 years ago
7 0

Answer:

112 x 4

Step-by-step explanation:

You might be interested in
Round your answer to the nearest tenth if necessary. Use 3.14 for it.
aliina [53]

Answer:

volume = 10,082.5 in³

Step-by-step explanation:

radius = 26/2 = 13

volume = πr²L = (3.14)(13²)(19) = 10,082.54 in³

6 0
3 years ago
Which equation would you use to find x?
Nitella [24]
You would use B to find X
8 0
3 years ago
If the length of a rectangle is a two-digit number with identical digits and the width is 1/10 the length and the perimeter is 2
Oksanka [162]

If the length of a rectangle is a two-digit number with identical digits and the width is 1/10 the length and the perimeter is 2 times the area of the rectangle, what is the the length and the width

Solution:

Let the length of rectangle=x

Width of rectangle=x/10

Perimeter is 2(Length+Width)

= 2(x+x/10)

Area of Rectangle= Length* Width=x*x/10

As, Perimeter=2(Area)

So,2(x+x/10)=2(x*x/10)

Multiplying the equation with 10, we get,

2(10x+x)=2x²

Adding Like terms, 10x+x=11x

2(11x)=2x^2

22x=2x²

2x²-22x=0

2x(x-11)=0

By Zero Product property, either x=0

or, x-11=0

or, x=11

So, Width=x/10=11/10=1.1

Checking:

So, Perimeter=2(Length +Width)=2(11+1.1)=2*(12.1)=24.2

Area=Length*Width=11*1.1=12.1

Hence, Perimeter= 2 Area

As,24.2=2*12.1=24.2

So, Perimeter=2 Area

So, Answer:Length of Rectangle=11 units

Width of Rectangle=1.1 units

7 0
3 years ago
Read 2 more answers
jony is twice as old as chika. jony is now 2 years old how old will chika be when jony is 30 years old
Serjik [45]
Jony is 2 now and is 2x older than Chika.  So Chika is 1 year old.  This means Chika is 1 year younger than Jony.  When Jony is 30, Chika is 29

5 0
3 years ago
On average, Tony the turtle completes a 15-foot course in 1 minute, and Antonio the turtle completes an 18-foot course in 1 minu
marishachu [46]

Answer:

15 feet.

Step-by-step explanation:

Tony's speed = 15 ft/min.

Antonio's = 18 feet /min.

So in 5 minutes Tony travels 5*15 = 75 feet and Antonio travels 5*18 = 90 feet.

So the answer is 90-75 = 15 feet.

8 0
3 years ago
Other questions:
  • What is the gcf of 54 and 81?
    9·1 answer
  • Which statements about the hyperbola are true? Check all that apply. There is a vertex at (–5, 2). The center of the hyperbola i
    7·2 answers
  • Sketch the polar curves r = 6 sin θ and r = 2+ 2 sin θ, then set up an integral that represents the area inside r = 6 sin θ and
    15·1 answer
  • A county fair charges $5 for tickets and $2 for each ride. What is the y-intercept in this scenario?
    6·1 answer
  • 3. Jim bought 2 books yesterday. The price
    12·1 answer
  • Use the distributive property to remove the parentheses -5(-2v + 4y - 6)
    15·1 answer
  • HELP! What is the solution to the following system of equations?
    5·1 answer
  • Choose the correct explicit formula for the sequence below.
    5·1 answer
  • PLEASE HELP. WILL GIVE BRAINLIEST AND 5.0 STAR RATING
    5·1 answer
  • Which expression is a factor of 3y2 + 144 - 24
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!