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4 years ago

WILL MARK BRAINLIEST

Mathematics

2 answers:

LenaWriter [7]4 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]4 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:

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torisob [31]

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10.3/4
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12. 1/2

13. 10/10=1/1
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17.2/3
18.1/5
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5 0

3 years ago

In the figure, GHF = EHD. Which statement is true by CPCTC?

Alex73 [517]

Step-by-step explanation:

it must be b but you can try others opinion because I can't remember anymore

8 0

3 years ago

I need help with these two please :’)

tatiyna

Answer:

59)

Therefore the height of the pyramid is 14 meter.

60)

Therefore the Diameter of Cone is 17.32 cm.

Step-by-step explanation:

59 )

Given:

Shape is Rectangular Pyramid,

Length = 3 meter

Width = 8 meter

Volume of Rectangular Pyramid = 112 cubic meter

To Find:

Height:

Solution:

We Know,

$\textrm{Volume of Rectangular Pyramid}=\frac{1}{3}(Length\times Width\times Height)$

Substituting the given values we have

$112=\frac{1}{3}(3\times 8\times Height)\\ \\\therefore Height=\frac{336}{24}\\\\\therefore Height=14\ meter\\$

Therefore the height of the pyramid is 14 meter.

60 )

Thee shape is of Cone

Given:

Height= 5 cm

Volume of cone = 125 π cm³

To Find:

Diameter of a cone = d = ?

Solution:

We know,

$\textrm{Volume of cone}=\frac{1}{12}\pi (Diameter) ^{2}\times Height$

Substituting the given values we have

$125\pi =\frac{1}{12}\pi d^{2}\times 5\\ \\d^{2}=25\times 12\\ \\d^{2}=300\\\\d=17.32\\ \therefore Diameter = 17.32\ cm$

Therefore the Diameter of Cone is 17.32 cm.

6 0

3 years ago

Cindy wants to send a card and a framed picture in a package.

inn [45]

Answer:

Step-by-step explanation:

7 0

4 years ago

Read 2 more answers

Help me for brainlist pleaseee

riadik2000 [5.3K]

Answer:

Step-by-step explanation:

reach triangle area is 1/2bh so

1/2(6)(4) = 12

there are 4 of them so

12x 4 = 48

then the square is 6x6 = 36

add the square to the triangle totals

48+38 = 84

8 0

3 years ago

*WILL MARK BRAINLIEST*

WILL MARK BRAINLIEST