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Gekata [30.6K]
3 years ago
8

Solve by Elimination

Mathematics
2 answers:
dezoksy [38]3 years ago
5 0
Answer: (3,4)

multiply both sides of the top equation by 2

get rid of the x variable by subtracting add all corresponding numbers and variables (4+(-4), -4+7, -4+16) which leaves you with 3y=12

divide both sides by 3 which cancels out the 3y and leaves you with y=4

input y in your top equation to find x. (-2x+2x4=2)

this leaves you with x=3

I HOPE THAT MADE SENSE!!!
Leona [35]3 years ago
3 0
1) (3,4), 2) (1,9), 3) (4,4)
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3x=2x+5<br> What is the value of x?
Alika [10]

Answer:

5

Step-by-step explanation:

3x=2x+5

3x-2x=5

x=5

Answer: x=5

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The ratio of similarity between two figures is 4/3.If one side of the largerfigure is 12 cm long,what is the lengthof correspond
Lelu [443]

Answer:

The corresponding side in the smaller figure is 9 cm

Step-by-step explanation:

Notice that you can use proportions to solve this problem:

The ratio from large image to smaller is: Larger/smaller = 4/3.

Therefore use this type of proportions to find the length of the corresponding side to 12 cm in the smaller figure:

\frac{4}{3} =\frac{12 \,cm }{smaller} \\smaller\,(\frac{4}{3}) = 12\,cm\\smaller=\frac{3* 12\,cm}{4} \\smaller=\frac{36\,cm}{4} \\smaller=9\,cm

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3 years ago
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18x3 + 6x2y - 9x2 - 3xy <br><br> factor completely
lutik1710 [3]

Answer:

\sf 3x(3x+y)(2x-1)

Step-by-step explanation:

Given expression:

\sf 18x^3 + 6x^2y - 9x^2 - 3xy

Factor out common term \sf 3x:

\sf \implies 3x(6x^2 + 2xy - 3x - y)

Factor \sf (6x^2 + 2xy - 3x - y)

Rearrange:

\sf \implies 6x^2 - 3x+ 2xy  - y

Factor pairs of terms:

\sf \implies 3x(2x-1)+ y(2x  - 1)

Factor out common term (2x - 1):

\sf \implies (3x+y)(2x-1)

Final solution:

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2 years ago
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3 years ago
Find the volume of the prism. round to the nearest tenth
babymother [125]

Answer:

V = 310.5 cm³

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Geometry</u>

Volume of a Prism Formula: V = lwh

  • <em>l</em> is length
  • <em>w</em> is width
  • <em>h</em> is height

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

<em>l</em> = 13.8 cm

<em>w</em> = 4.5 cm

<em>h</em> = 5 cm

<u>Step 2: Solve for </u><em><u>V</u></em>

  1. Substitute in variables [Volume of a Prism Formula]:                                    V = (13.8 cm)(4.5 cm)(5 cm)
  2. Multiply:                                                                                                             V = (62.1 cm²)(5 cm)
  3. Multiply:                                                                                                             V = 310.5 cm³
6 0
3 years ago
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