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qwelly [4]
3 years ago
15

What is the first step to take when solving this linear system of equations by the addition-subtraction method? 2x + 4y = 3 x +

3y =13 A) solve for y in terms of x B) solve for x in terms of y C) multiply the first equation by −2 D) multiply the second equation by −2
Mathematics
1 answer:
Free_Kalibri [48]3 years ago
5 0

The right answer is Option D.

Step-by-step explanation:

Given equations are;

2x+4y=3    Eqn 1

x+3y=13    Eqn 2

When we use subtraction-addition method, we make one of the variables same with opposite signs so that only one variable remains after addition or subtraction.

In the given problem, we will multiply Eqn 2 with "-2" so that the x variables become equal and then we can add both the equations and solve for y.

Therefore,

The first step will be to multiply the second equation by -2 to solve the linear system of equations.

The right answer is Option D.

Keywords: linear equations, subtraction

Learn more about linear equations at:

  • brainly.com/question/8902155
  • brainly.com/question/8955867

#LearnwithBrainly

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Two planes A and B start from the same place and move in different directions making an angle of 50° between them the speed of p
Alika [10]

Answer:

The distance between them is 230.65 miles

Step-by-step explanation:

Here we use the Cosine formula

a^2 = b^2 + c^2 - 2bc\ cos\ A\\\\a^2 = 200^2 + 300^2 - 2\times 200\times 300cos50^{\circ}\\\\= 40,000 + 90,000 - 120,000cos50^{\circ}\\\\= 130,000 - 120,000 \times 0.64\\\\= 130,000 - 76,800\\\\a^2= 53,200\\\\a = \sqrt{53,200} \\\\= 230.65\ miles\ per\ hour

Now the distance for one hour is

= 230.65 ÷ 1

= 230.65 miles

4 0
3 years ago
Which expression is equivalent 1/3x(9y-12)
chubhunter [2.5K]

Answer:

3y - 4

Step-by-step explanation:

<u>Step 1:  Distribute</u>

1/3 * (9y - 12)

(1/3 * 9y) + (1/3 * -12)

(3y) + (-4)

3y - 4

Answer:  3y - 4

6 0
3 years ago
Read 2 more answers
Pedro uses shapes to make a funny animal. Which best tells about the
Pani-rosa [81]

Answer:

The sides of all the shapes are straight

Step-by-step explanation:

Pedro animal has the shape of a horse. The animal is made up of different shapes, we can see that the shapes Pedro animal is made up of consist of two triangles, three rectangles and a hexagon.

All this shapes mentioned above (triangle, rectangle and hexagon) that are used in making this animal have sides with straight edges. Therefore the sides of all the shapes are straight.

7 0
3 years ago
Jumlah panjang rusuk sebuah kubus adalah 84cm. luas permukaannya adalah.....
antoniya [11.8K]

Answer:

Total surface area of cube = 294 cm²

Step-by-step explanation:

Given:

Perimeter of cube = 84 cm

Find:

Total surface area of cube

Computation:

Perimeter of cube = 12 x side

84 = 12 x side

Side = 7 cm

Total surface area of cube = 6(a)²

Total surface area of cube = 6(7)²

Total surface area of cube = 294 cm²

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3 years ago
What are the coordinates of the point where the total costs for both companies are the same? Question 1 options: (2, 60) (0, 0)
Molodets [167]

Answer:

0,0

Step-by-step explanation:

5 0
2 years ago
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