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
Vlad1618 [11]
3 years ago
10

−3x + 7y = −16 −9x + 5y = 16 slove this

Mathematics
1 answer:
Ahat [919]3 years ago
5 0


{-3x+7y=-16 ⇒ -3x=-16-7y    (↓)

{-9x+5y=16

The second equation:

-9x+5y=16

3*(-3x)+5y=16         <em>Substitute -3x    (↑)</em>

<em>3* </em>(-16-7y)+5y=16

-48-21y+5y=16      /+48

-16y=64      /:(-16)

y=-4

-3x=-16-7y

-3x=-16-7*(-4)=-16+28=12

-3x=12    /:(-3)

x=-4

<em /><em>Solution: (-4; -4)</em>



You might be interested in
What is the perimeter of polygon ABCDEF
MissTica
47 is the perimeter
3 0
3 years ago
Read 2 more answers
What is mythology and therefore why is it important?​
Mrrafil [7]

Answer:

mythology is important for both individualistic and collective reasons. On an individual level, mythology could teach moral or human truths, whereas on a collective level mythology could be used to keep people in touch with their origins. Mythological stories could then be used to teach children values such as hard work, diligence and obedience.

Step-by-step explanation:

6 0
2 years ago
Brian cut a piece of cardboard in the shape of a trapezoid the area of the cut out is 43.5 cm² if the bases are 6 cm And 8.5 cm
Likurg_2 [28]

Answer: the height of the trapezoid is 6 cm

Step-by-step explanation:

The formula for determining the area of a trapezoid is expressed as

Area = 1/2(a + b)h

Where

a and b are the length of The bases are the 2 sides of the trapezoid which are parallel with one another.

h represents the height of the trapezoid.

From the information given,

a = 6 cm

b = 8.5 cm

If the area of the cut out is 43.5 cm², then

53.5 = 1/2(6 + 8.5)h

Cross multiplying by 2, it becomes

43.5 × 2 = (6 + 8.5)h

87 = 14.5h

h = 87/14.5 = 6 cm

8 0
2 years ago
Divide (18x^3 + 12x – 3x) ÷ 6x^2
andre [41]
First let's simplify it

\frac{18x^3 + 9x}{6x^2}

Now let's factor it
\frac{9x(2x^2 + 1)}{6x^2}

Lastly, let's simplify
\frac{3(2x^2 + 1)}{2x}

4 0
2 years ago
Humberly has $24 and they want to buy at least 8 containers of yogurt. Yogurt is packaged in both large and small containers. La
yanalaym [24]

Answer:

Hence he will be 4 large containers and 4 small containers

Step-by-step explanation:

Given data

Let the number of small containers be x

and the number of large containers be y

x+y= 8---------1

also

2x+4y= 24-----2

the system of equation to solve the problem is

x+y= 8

2x+4y= 24

from 1

x=8-y

put this in 2

2(8-y)+4y= 24

16-2y+4y= 24

2y= 24-16

2y= 8

y= 8/2

y= 4

put y= 4 in 1

x+4=8

x= 8-4

x= 4

Hence he will be 4 large containers and 4 small containers

6 0
2 years ago
Other questions:
  • 4x+2y=10 <br> X-y=13 <br> Write in (x,y)
    6·1 answer
  • 39=1 3/10b what will be the answer show work
    6·1 answer
  • Number 6 please ..............
    14·1 answer
  • 30% of the deposit was $75 how much more is owes
    5·1 answer
  • 40 feet to 260 feet ratio
    5·1 answer
  • I need help please?!!!!
    7·1 answer
  • Find the area of the triangle by forming a parallelogram.<br> Please I need it fast!
    13·2 answers
  • What conclusion can be made based on this equation 8×6=48
    12·2 answers
  • Someone pls help me I will make you as brain
    6·2 answers
  • Which equation describes a line parallel to y= 4x+ 5 through point (-2, 1)?​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!