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
weqwewe [10]
3 years ago
8

Three pens and two notebooks cost 8.25. two pens and three notebooks cost $8.00. how much would two pens and two notebooks cost?

Mathematics
1 answer:
goblinko [34]3 years ago
6 0
3p + 2n = 8.25 ....multiply by 2
2p + 3n = 8 .........multiply by -3
-------------------
6p + 4n = 16.5 (result of multiplying by 2)
-6p - 9n = - 24 (result of multiplying by -3)
-------------------add
-5n = - 7.5
n = -7.5 / -5
n = 1.50 .............notebooks cost 1.50 each

2p + 3n = 8
2p + 3(1.50) = 8
2p + 4.50 = 8
2p = 8 - 4.50
2p = 3.50
p = 3.50/2
p = 1.75......pens cost 1.75 each

so 2 pens and 2 notebooks cost : 2(1.75) + 2(1.50) = $ 6.50 <==
You might be interested in
What is the height of the tree?
Nataly [62]

Answer:

The tree is 16 ft tall

3 0
3 years ago
Find the measure of x.
Andru [333]

Answer:

C

Step-by-step explanation:

Since the triangles are congruent then corresponding angles are congruent

x is the angle between line with 3 strokes and 2 strokes

The corresponding angle is therefore ∠ C

∠ C = 180° - (63 + 29)° = 180° - 92° = 88°

Then x = 88 → C

5 0
3 years ago
A bus travels at 10 km in 30 minutes. What is the average speed of the bus?
zhannawk [14.2K]

Answer:

20 kph

Step-by-step explanation:

Step 1:

10 : 30         Ratio

Step 2:

60 mins in hour        

Step 3:

10 : 30 = x : 60        Equation

Step 4:

30x = 600       Multiply

Step 5:

x = 600 ÷ 30         Divide

Answer:

x = 20

Hope This Helps :)

8 0
3 years ago
Cody wants to watch a new movie that is 3 hours long. He has watched 1/6 of the movie so far. What fraction of one hour did Cody
lesya692 [45]
What we know: 
1/6 = what Cody wathed
1 stands for the unit that cody has watched a move (minutes) 
6 = stands for the entire length of the movie (minutes)

Tharefore: If 6 stands for the entire length of the movie the movie is equal to 3 hours. However we are giving the unit in minutes not in hours, it would be:
3 x 60 = 3 stands for the ours 60 stands for minutes in an hour. That equals to 180.
This means that the 6 = 100% = 180min of the movie.

To figure what 1 stands for we need to divide 1/6. That will equal to 0.1(6). 0.1(6) x 180 (minutes of the entire movie) = 30 which would be the answer. Here is what you should have done using mathematical communication:

converting 3 h to minutes:

3 x 60 = 180 minutes
180 = the length of the entire movie
1/6 = 0.1(6)
0.1(6) x 180 = 30 
... 30 /180 is the fraction of minutes that Cody spend watching the movie
in other words Cody just spent 30 min watching the movie.

5 0
3 years ago
Read 2 more answers
0.5w+3x, when w=6, v=5
Lina20 [59]

Answer:

18

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Please help <br><img src="https://tex.z-dn.net/?f=1.488%20%20%5Cdiv%202.1" id="TexFormula1" title="1.488 \div 2.1" alt="1.488
    5·1 answer
  • Plllzzzzz help me asap please asap asap asap please pretty please !!!!!!!!!!!!
    12·1 answer
  • I really need help with 22 plz
    6·1 answer
  • How many ounces of pure gold and a 16 carry the old change and it weighs 2.5 ounces
    14·1 answer
  • Three consecutive odd integers have a sum of 3.what are the number
    8·1 answer
  • 63 is 70% of what number
    5·2 answers
  • (MULTIPLE CHOICE QUESTION)
    12·2 answers
  • Ellie purchased 7 shirts that were originally priced at $15.50
    14·2 answers
  • Is -0.3 with the line over the 3, a rational, irrational number or integer?​
    14·1 answer
  • please help 50 points!!!! answer 1-5 please if you can show how you got the answer if you cant its ok at least show how you got
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!