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Brilliant_brown [7]
3 years ago
8

-3x+5y=-9 and 4x+8y=12

Mathematics
2 answers:
liq [111]3 years ago
7 0

Let's solve your system by substitution.

−3x+5y=−9;4x+8y=12

Step: Solve−3x+5y=−9for x:

−3x+5y=−9

−3x+5y+−5y=−9+−5y(Add -5y to both sides)

−3x=−5y−9

−3x

−3 = −5y−9 −3

(Divide both sides by -3)

x=

5

3

y+3

Step: Substitute

5

3

y+3forxin4x+8y=12:

4x+8y=12

4(

5

3

y+3)+8y=12

44

3

y+12=12(Simplify both sides of the equation)

44

3

y+12+−12=12+−12(Add -12 to both sides)

44

3

y=0

44

3

y

44

3

=

0

44

3

(Divide both sides by 44/3)

y=0

Step:

3 y+3:

x= 5

3 y+3

x= 5

3 (0)+3

x=3(Simplify both sides of the equation)

Answer:

x=3 and y=0

insens350 [35]3 years ago
4 0

-3x + 5y = -9

4x + 8y = 12

Simplify the second,

x + 2y = 3

Times three,

3x + 6y = 9

Add to the first equation,

11y = 0

y = 0

-3x + 5(0) = -9

x = 3

Answer: x=3, y=0

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You could use 10, 6 and 7.

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Hope this helps!
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3 years ago
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Fudgin [204]

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5 0
3 years ago
HELP ASAP 10 POINTSSSS
dlinn [17]
Answer:
Y= -4 :)

Steps:
Apply rule
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Simplify
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7 0
3 years ago
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Da<br> A<br> Solve the equation 2x^2+3=0
Anika [276]

Answer:

x = ±i(√6 / 2)

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Equality Properties

<u>Algebra I</u>

  • Solving quadratics

<u>Algebra II</u>

Imaginary root i

  • √-1 = i

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

2x² + 3 = 0

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

  1. [Subtraction Property of Equality] Subtract 3 on both sides:                        2x² = -3
  2. [Division Property of Equality] Divide 2 on both sides:                                  x² = -3/2
  3. [Equality Property] Square root both sides:                                                    x = ±√(-3/2)
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Irina has 6 tubs of yogurt she wants to scoop it all into bowls each bowl holds 1/4 tub of yogurt which division equation can be
elena55 [62]
In order to find the answer, you can use-

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In order to get the answer, you multiply 6 by the denominator. 

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Then, you'd divide the solution of that part by the numerator.

24 divided by 1 equals 24.


Therefore, the final answer would be 24.


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