![kimmy6973](/avatars/31247.jpg)
kimmy6973
13.09.2021 •
Mathematics
if 4 notebooks and 3 packages of pens cost $7.43 and 5 notebooks and 2 packages of pens cost $7.03 what is the cost of 1 notebook
Solved
Show answers
More tips
- H Health and Medicine Sunstroke: Causes, Symptoms, and Precautions...
- F Family and Home Do You Really Need a Playpen for Your Child?...
- F Food and Cooking Do Aphrodisiacs Really Work? Separating Fact from Fiction...
- C Computers and Internet Log-in: what is it and why do you need it?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Mathematics
- M Mathematics I NEED HELP FAST! What is the circumference of the circle below?...
- M Mathematics Karen had 2 spools of wire. each spool had 15 7/8 yards of wire. karen used 3 yards of wire from each spool. how many yards of wire were left of the spools?...
- M Mathematics Round 0.01234 to 2 significant digits...
- M Mathematics Karen is buying supplies for a party. she plans to buy at least $100 on food and at least $50 on party favors. which graph shows the solution set to the amount of money...
- M Mathematics (sinx + icosx)^n = cos( nπ\2 - nx) + isin( nπ\2 - nx)...
- M Mathematics Last i promise: (btw i really need to pass this) you are awesome if you me....
- M Mathematics Fran is going to transfer her credit card balance over to a new card. she has an existing balance of $752.69. her current card charges her a transfer fee of 12.5%, added...
- M Mathematics What is the common factors of 36 and 40...
- M Mathematics Find the rule solve for n 20,24,n,32...
- M Mathematics What is the value of x in the equation 2x – 3 = 9 – 4x?...
Ответ:
3
Step-by-step explanation:
Ответ:
Step-by-step explanation:
let,
cost of 1 notebook be x
and , cost of 1 package of Pens be y
so, a/q
4 books = 4x
and 3 package of Pens = 3y
so, the equation is
4x + 3y = $7.43 (eqⁿ 1)
and,
5 notebooks = 5x
2 packages = 2y
so, the equation is
5x + 2y = $7.03 (eqⁿ 2)
now,
multiply (eqⁿ 1) by 5 and (eqⁿ 2) by 4
so, we got
20x + 15y = $37.15 (eqⁿ 3)
and
20x + 8y = $28.12 (eqⁿ 4)
now,
subtract (eqⁿ 4) from (eqⁿ 3)
we got,
7y = $4.03
→ y = 4.03/7 = $1.29
therefore,
→ 4x + 3(1.29) = $7.43
→ 4x + 3.87 = $7.43
→ 4x = 7.43 - 3.87 = 3.56
→ x = 3.56/4 = 0.89
→ x = $0.89
therefore, cost of one notebook is $0.89
hope this answer helps you dear...take care and may u have a great day ahead!
Ответ: