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
Vaselesa [24]
3 years ago
14

joanna went school supply shopping she spent $35.98 on notebooks and pencils notebooks cost $2.30 each and pencils cost $1.42 ea

ch she bought a total of 21 notebooks and pencils how many of each did she buy
Mathematics
1 answer:
Mumz [18]3 years ago
6 0

Joanna bought 7 notebooks and 14 pencils

Step-by-step explanation:

Step 1 :

Let x denote the number of notebooks and y denote the number of pencils Joanna bought.

Cost of one notebook = $ 2.30

Cost of one pencil = $1.42

Step 2 :

Total of notebooks and pencils bought  = 21

=> x + y = 21 => y = 21-x

Total cost of notebooks and pencils = $35.98

=> 2.3x + 1.42y = 35.98

Substituting y = 21- x here , we have,

2.3x + 1.42 ( 21-x) = 35.98

2.3x + 29.82 - 1.42x = 35.98

0.88 x = 6.16

=> x = 7

y = 21-x = 21-7 = 14

Step 3 :

Answer :

Joanna bought 7 notebooks and 14 pencils

You might be interested in
The U.S. Department of Housing and Urban Development​ (HUD) uses the median to report the average price of a home in the United
MatroZZZ [7]

Answer:

Step-by-step explanation:

given that the U.S. Department of Housing and Urban Development​ (HUD) uses the median to report the average price of a home in the United States.

We know that mean, median and mode are measures of central tendency.

Mean is the average of all the prices while median is the middle entry when arranged in ascending order.

Mean has the disadvantage of showing undue figure if extreme entries are there. i.e. outlier affect mean.

Suppose a price goes extremely high, then mean will fluctuate more than median.

So median using gives a reliable estimate since median gives the middle price and equally spread to other sides.

3 0
3 years ago
6×5/6=24 I think I hope
Rom4ik [11]
No 6x5/6 is 5.
6x5 is 30.
30/6=5
Ignore @popmypussy
Hope i could help!
Thunderclan89
7 0
3 years ago
What is the value of y in the product of powers below? 8^3x8^-5x8^y=8^-2=1/8^2​
Ber [7]
The answer is y=207 hope this helps
4 0
2 years ago
ANYONE HELP ON THIS I HAVE 10 MINS LEFT ON MY FINAL PLEASE
igor_vitrenko [27]
It would be E) nothing, since it would be 289.82
6 0
2 years ago
Find f(-3) if f(x) =x^2
Gnom [1K]
The answer is 9.
Hope I helped
8 0
3 years ago
Read 2 more answers
Other questions:
  • A stapes bone has a mass of about 4.27mg.round this number to the nearest hundredth of a milligram ,the nearest of a tenth of a
    14·1 answer
  • Skylar makes turkey sandwiches for a family reunion. He purchases 5 pounds 4 ounces of sliced turkey for $26.88. What is the uni
    9·1 answer
  • While traveling to Europe, Phelan exchanged 250 US dollars for euros. He spent 150 euros on his trip. After returning to the
    8·1 answer
  • Which trinomial is the product of the expression below?
    6·2 answers
  • Giving brainliest for correct awnser. Factor the expression below. <br>​
    7·1 answer
  • Does anyone know this
    14·1 answer
  • PLEASE HELP!!!<br> Solve the inequality: <br> 5 (2x-3) - 6x &gt; -2 (x - 6) +3
    5·2 answers
  • Can anyone help me with this?​
    6·1 answer
  • SOMEONE PLEASE HELP ME! I promise i will mark brainlest, but i need the right answer for this. help is much appreciated &lt;3
    14·1 answer
  • What is the area of the regular polygon shown below?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!