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AnnZ [28]
3 years ago
12

Identify a possible first step using the elimination method to solve the system and then find the solution to the system.

Mathematics
1 answer:
olchik [2.2K]3 years ago
8 0

Answer:x = 1

y = 1

Step-by-step explanation:

The given system of simultaneous equations is expressed as

3x - 5y = - 2 - - - - - - - - - - - - 1

2x + y = 3 - - - - - - - - - - - - - 2

The first step is to decide on which variable to eliminate. Let us eliminate x. Then we would multiply both rows by numbers which would make the coefficients of x to be equal in both rows.

Multiplying equation 1 by 2 and equation 2 by 3, it becomes

6x - 10y = - 4

6x + 3y = 9

Subtracting, it becomes

- 13y = - 13

y = - 13/- 13 = 1

The next step is to substitute y = 1 into any of the equations to determine x.

Substituting y = 1 into equation 2, it becomes

2x + 1 = 3

2x = 3 - 1 = 2

x = 2/2 = 1

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Which number produces a rational number when added to 0.42
kenny6666 [7]
Any Whole or Rational Number, 1 can be used as an Example if you want it Simple

4 0
3 years ago
If cos x = sin(20+x) degrees and 0 degrees < x < 90 degrees, the value of x is
Natalka [10]

Answer:

50

Step-by-step explanation:

Which number is greatest?

2.89 times 10 Superscript negative 8

1.997 times 10 Superscript 2

8.9 times 10 Superscript negative 6

5 times 10 Superscript negative 6

4 0
3 years ago
Help pls!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
postnew [5]

Answer?

What do you need help with? :)

5 0
2 years ago
25 points, look at the picture.
attashe74 [19]

Answer:

1080

Step-by-step explanation:

PEMDAS says multiply and divide from left to right

9*5*6*3÷3*4*6÷6

45*6*3÷3*4*6÷6

270*3÷3*4*6÷6

810÷3*4*6÷6

270*4*6÷6

1080*6÷6

6480÷6

1080

6 0
3 years ago
The length of a rectangle is twice the with. If the perimeter of the rectangle is 60 units, find the area of the garden
Darya [45]

w - width

2w - length

60 - perimeter

w + w + 2w + 2w = 6w - perimeter

The equation:

6w = 60    <em>divide both sides by 6</em>

w = 10 → 2w = 2 · 10 = 20

The area: A = width × length

A = (10)(20) = 200

<h3>Answer: The area of the garden is equal 200 square units.</h3>
4 0
3 years ago
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