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
Yuri [45]
3 years ago
11

*WILL MARK BRAINLIEST*

Mathematics
2 answers:
LenaWriter [7]3 years ago
4 0

The text itself determined how to solve the problem.

Namely, two object are given in two relations and we conclude that we have two variables that we present with two equations.

We will take hardcover books as x and paperbacks as y.

First equation is  4x+10y=64

Second equation is  5x+7y=58

This is system of two linear equations with two variables

To solve this system we will use Gaussian agorithm with which we make

gradual elimination of the variables.

We will multiply first equation with number 4 and second with number (-5)

and get

20x+50y=320   and   -20x-28y=-232

When we add first equation to another we get

variable x is eliminated  

50y-28y=320-232 => 22y=88 => y=88/22=4

y=4  when we replace variable y in the first equation before multiplying

we get  4x+10*4=64 => 4x+40=64 => 4x=64-40 => 4x=24 => x=24/4=6

x=6

Total charge for hardcovers is  => 4x+5x=9x=9*6=54$

Total charge for paperbacks is => 10y+7y=17y=17*4=68$

Good luck!!!



olchik [2.2K]3 years ago
4 0

Answer:

The text itself determined how to solve the problem.

Namely, two object are given in two relations and we conclude that we have two variables that we present with two equations.

We will take hardcover books as x and paperbacks as y.

First equation is  4x+10y=64

Second equation is  5x+7y=58

This is system of two linear equations with two variables

To solve this system we will use Gaussian agorithm with which we make

gradual elimination of the variables.

We will multiply first equation with number 4 and second with number (-5)

and get

20x+50y=320   and   -20x-28y=-232

When we add first equation to another we get

variable x is eliminated  

50y-28y=320-232 => 22y=88 => y=88/22=4

y=4  when we replace variable y in the first equation before multiplying

we get  4x+10*4=64 => 4x+40=64 => 4x=64-40 => 4x=24 => x=24/4=6

x=6

Total charge for hardcovers is  => 4x+5x=9x=9*6=54$

Total charge for paperbacks is => 10y+7y=17y=17*4=68$

Good luck!!!

Step-by-step explanation:

You might be interested in
Duffy Duck, If you see this, is Y rational?
oksano4ka [1.4K]

Answer:

i think so

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Omar have 2 closet with 3 shelve and 5 backpacks on each shelve
Gekata [30.6K]

Step-by-step explanation:

And he wants to know how many backpacks he has. Simple!

2*3*5=25 backpacks

:)

5 0
3 years ago
A die is rolled once what is the probability of rolling not a 4
snow_lady [41]

Answer:

I think 1/6

Step-by-step explanation:

A die has 6 sides so every side has 1/6 chance to land on

8 0
3 years ago
Solve the system of equations.<br> 8.2 + 5y = 24<br> y = -42<br> C =<br> y =
Paul [167]

Answer:

8.2 + 5y = 24 is y = 3.16

y = -42 = 0

c=1

y=1

Step-by-step explanation:

i think these confirm to graphs if i'm wrong just tell me and i'll edit my question.

7 0
3 years ago
Solve 2x + 4 &gt; 16.<br> NEED ANSWER ASAP
antiseptic1488 [7]

Answer:

x>6

Step-by-step explanation:

2x > 16-4

x > 12/2

x > 6

7 0
2 years ago
Read 2 more answers
Other questions:
  • A bag of snack mix weighs 12 ounces. A serving size is 3/4
    5·1 answer
  • Which of the following is not a pair of similar polygons?
    9·2 answers
  • Compare 4 x 105 and 5 x 103.
    9·1 answer
  • What is the area of a circle who's radius is 4 ft?
    9·2 answers
  • Solve for x<br><br> x2 - 3|x - 2| - 4x = -6
    7·1 answer
  • Weighing about a ton on their 14th birthday, the average T-Rex grew 4.6 pounds per day from the age 14 to 18 years! Write a form
    6·1 answer
  • 1. Choose the best property to fill in the blank:
    10·1 answer
  • The perimeters of the square and the regular pentagon are equal.
    15·2 answers
  • SOLVE THIS FOR ME AND YOUR A LEGEND! THANK YOU!
    7·1 answer
  • A store offers a 30% discount on a coat that originally sold for $120. The coat still does not sell, so the store offers another
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!