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
Kruka [31]
3 years ago
9

4 pencils and 3 crayons are 20.9 inches. 5 pencils and 4 crayons are 26.5 inches. Each pencil is the same length as the other pe

ncils, and each crayon is the same length as the other crayons. What is the length of 1 pencil? What is the length of 1 crayon?
Mathematics
1 answer:
erastova [34]3 years ago
5 0

Answer:

The length of the pencils is 4.1 inches and for the crayons 1.5 inches

Step-by-step explanation:

We can solve by means of a 2x2 system of equations, we have to:

let "x" be the length of the pencils

let "y" be the length of the crayons

4 * x + 3 * y = 20.9

5 * x + 4 * y = 26.5 => x = (26.5 - 4 * y) / 5

Replacing:

4 * (26.5 - 4 * y) / 5 + 3 * y = 20.9

21.2 - 3.2 * y + 3 * y = 20.9

-0.2 * y = 20.9 - 21.2

y = -0.3 / -0.2

y = 1.5

now for x:

x = (26.5 - 4 * 1.5) / 5

x = 4.1

This means that the length of the pencils is 4.1 inches and for the crayons 1.5 inches

You might be interested in
Which is bigger 3/4 or 2/3
tia_tia [17]
When we make it into a common denominator, find a common multiple between the denominators. For this instance, it is 3/4=9/12 2/3=8/12 When we see it with a common denominator, 3/4 is bigger than 2/3.
8 0
3 years ago
Read 2 more answers
What is the value of y in the equation y = 3x - 2, when x = 2
Travka [436]

Answer:

y=4

Step-by-step explanation:

3 x 2=6

6 - 2= 4

8 0
3 years ago
Read 2 more answers
How do you find the surface area
WITCHER [35]

Answer:

It depends on what shape you have. Here are some formulas for different shapes.

Step-by-step explanation:

Rectangular prism: 2lw + 2lh + 2wh

Cylinder: 2 pi <em>r</em>² + 2 pi <em>rh</em>

Sphere: 4 pi <em>r</em>²

Cone: pi <em>r</em>² + pi <em>rl</em>

Square-based pyrimid: 1/2<em>lp</em> +<em>B</em>

<em />

I hope this helps!

3 0
3 years ago
I will get beaten if i dont have this done help!!!
Stella [2.4K]

Answer:

If you are being bullied you should tell someone immediately so they can help you stand up to that bully. I know this isn't your answer but you should take this seriously.

Step-by-step explanation:

3 0
3 years ago
Jake bought some blueberries for $6 per pound and some strawberries for $4 per pound. He spent a total of $36. Which graph repre
Zarrin [17]

Answer:

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Find the value of the function sin 9pi/7?
    11·1 answer
  • 102,119,107,113,110, x; mean 114
    9·1 answer
  • an adult takes 600mg of ibuprofen. Each hour, the amount of ibuprofen in the persons system decreases by about 29%. About how mu
    8·1 answer
  • Help me out pleaseeeeee!!
    11·1 answer
  • Help?????????????????
    14·1 answer
  • John has 4 dimes and 8 quarters in a box. Find the probability of drawing a dime.
    8·1 answer
  • Trucker's Heaven Diner uses hundreds of plates, glasses, and cups each day. The dishwashers start a new load of dishes every 1 1
    13·1 answer
  • 3400 people attended a football game. 2312 of the people attending supported the home team, while 1088 supported the visiting te
    14·1 answer
  • In a shipment of shirts to a clothing store, 2/5 of the shirts are blue and 3/10 of the shirts are red. ​If there are 20 shirts
    10·1 answer
  • The probability that it will rain on Thursday is 67%. What is the probability that it won’t rain on Thursday? Express your answe
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!