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kondor19780726 [428]
3 years ago
14

Find the solution for the following equations using substitution or elimination:

Mathematics
1 answer:
Dvinal [7]3 years ago
8 0

Answer:

(4, 1)

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Solving systems of equation using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define systems</u>

2x - 3y = 5

4x + 2y = 18

<u>Step 2: Rewrite systems</u>

2x - 3y = 5

y = 9 - 2x

<u>Step 3: Solve for </u><em><u>x</u></em>

  1. Substitute:                              2x - 3(9 - 2x) = 5
  2. Distribute -3:                          2x - 27 + 6x = 5
  3. Combine like terms:              8x - 27 = 5
  4. Add 27 on both sides:           8x = 32
  5. Divide 8 on both sides:         x = 4

<u>Step 4: Solve for </u><em><u>y</u></em>

  1. Define:                    2x - 3y = 5
  2. Substitute:              2(4) - 3y = 5
  3. Multiply:                  8 - 3y = 5
  4. Isolate <em>y</em> term:         -3y = -3
  5. Isolate <em>y</em>:                 y = 1

And we have our final answer!

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Andru [333]
The dimension of the document is 35 inches by 40 inches.
It is redrawn at a scale of 1 1/2 or 3/2 or 1.5
The dimension will be:
35 * 1.5 = 52.5 in
40 * 1.5 = 60 in

Then redrawn again at 1/4 or 0.25
52.5 * 0.25 = 13.125 in
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5 0
3 years ago
Simplify the expression. 1/3r + 1/4 + 2/3r + 3/4​
expeople1 [14]

Answer:

r+1

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
WHOEVER ANSWERS FIRST GETS BRAINLIEST AND 100 POINTS <br> 0.1*√20000<br> -0.05*√28800
____ [38]

Answer:

0.1*√20000 = 14.1421356237

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Step-by-step explanation:

8 0
3 years ago
Can anyone help I have tried finish for days
devlian [24]

Answer:

34 degrees.

Step-by-step explanation:

First of all, the sum of a triangle's degree is 180.

The angle next to the 101 is 79 degree due to the rule of supplementary angle. The angle vertical to 28 is also 28. (Vertical angles are equal).

Now we now the two side, we can figure out the last side.

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The last angle is 73 degrees. However, we are looking for x.

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All we have to do now is subtract 39 from 73, and that leaves us with 34.

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3 years ago
Is the area of this 36 (2, 8),<br> (2, 2), (–4, 2), and (–4, 8).
almond37 [142]

Answer:

yes

Step-by-step explanation:

side 1

(2,8) to (2,2)

8-2 = 6 (length of this side)

side 2

(2,2) to (-4,2)

2-(-4) = 6

side 3

(-4,2) to (-4,8)

8-2 = 6

side 4

(-4,8) to (2,8)

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* note: it doesn't matter the order of subtraction because length can't be negative (so just make sure your answer is positive) , also don't subtract the side that is constant, you will get 0, a side can not be 0 cm

to find the area of a square multiply length by width

6 x 6 = 36

5 0
3 years ago
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