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
N76 [4]
1 year ago
9

Please help with this i’ll give brainliest

Mathematics
1 answer:
cricket20 [7]1 year ago
3 0

Answer:

<em>Answer to part A:</em>

1 notebook = $2.5

1 pen = $1.5

<em>Answer to part B:</em>

           = 3 pens.

Step-by-step explanation:

  • <em>Here's the simultaneous equation.</em>

4n + 3p = $14.50

5n + 6p = $21.50

  • <em>Multiply the numerator by the denominators first number and vice-versa.</em>

5(4n + 3p) = $14.50

4(5n + 6p) =$ 21.50

  • <em>Here's what you should get.</em>

20n + 15p = $72.50

20n + 24p = $86

  • <em>Eliminate the like numbers by subtracting the denominator from the numerator.</em>

20n - 20n        = 0

15p - 24p         = -9p

$72.50 - $86   = -$13.5

  • <em>Divide the result after the equal sign by the result before the equal sign.</em>

-$13.5 ÷ -9 = $1.5p

  •   <em>Since we've found the cost of one pen as $1.5, lets substitute any of the first equations to get the cost of one notebook.</em>

4n + 3p = $14.50

4n + 3($1.5) = $14.50

4n + $4.5 = $14.50

4n = $14.50 -  $4.5

4n = $10.00

n = $2.5

  • <em>Here's the answer to part A:</em>

1 notebook = $2.5

1 pen = $1.5

  • <em>Part B::::::::::::::::::</em>

1 ($1.5) = 3($2.5)

$1.5 + $7.5 = $9.0

$27 ÷ 9 = $3

  • <em>Therefore, she'll buy each supply thrice:</em>

3 ( $1.5 + $7.5 ) = 3 ( $9.0 )

( $4.5 + $22.5 ) = ( $27 )

  $4.5 + $22.5 = $27

  • <em>Answer to part B:</em>

           = 3 pens.

<em />

<em />

<em />

You might be interested in
How do you solve for this????<br>​
Rainbow [258]

Answer:

D: 29,000

Step-by-step explanation:

Add all the numbers up then divide them by the amount of numbers there are.

3 0
2 years ago
Is 16-7=4+5 true, false, or open?
jek_recluse [69]

Answer:

open

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Correct Answers only please!
elixir [45]

Answer:

A

Step-by-step explanation:

so basically batting average is hits with no strikeouts or catches. add all the hits 50+10+5+11 which is 76. take 76/260 (76 hits out of 260 tries) to get .29

5 0
3 years ago
310=-6.2f<br> f=??? so confused
Mariulka [41]
F=-50 as multiplying it by -6.2 would give you a positive 310
6 0
3 years ago
Item 1
victus00 [196]

Step-by-step explanation:

the sign - "<" correctly compares this ( -35__-23).

hope this helps you.

3 0
2 years ago
Other questions:
  • Which of the following expressions is equivalent to the expression below ?
    9·1 answer
  • Arc CD 2/3 of the circumstance of a circle. What is the radian measure of the central angle?
    14·1 answer
  • What is a simpler form of the following expressions?
    14·1 answer
  • Can someone help me out?
    12·1 answer
  • Simplify negative 2 and 1 over 9 – negative 4 and 1 over 3.
    12·1 answer
  • Los numeros primos menores que 15​
    12·2 answers
  • Simplify: 3(9+3⋅8)−23
    11·2 answers
  • Ixl totally amazing but its really stu pid
    11·1 answer
  • Find the area of the shaded region. geometry please help if your good at it. will mark brainlist
    15·1 answer
  • Help PLS!!! DONT MAKE ANY CAP PLEASE!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!