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Vadim26 [7]
3 years ago
5

Need help quickly its hard

Mathematics
1 answer:
kaheart [24]3 years ago
6 0

Answer:

1-3x+8y

Step-by-step explanation:

Multiply y and 2

Multiply y and 1

The y just gets copied along.

2*y evaluates to 2y

Multiply x and 4

Multiply x and 1

The x just gets copied along.

The answer is x

4*x evaluates to 4x

2*y-4*x evaluates to 2y-4x

The answer is 2y-4x+8

2*y-4*x+8 evaluates to 2y-4x+8

Multiply y and 6

Multiply y and 1

The y just gets copied along.

The answer is y

6*y evaluates to 6y

2y + 6y = 8y

The answer is 8y-4x+8

2*y-4*x+8+6*y evaluates to 8y-4x+8

-4x + x = -3x

The answer is -3x+8y+8

2*y-4*x+8+6*y+x evaluates to -3x+8y+8

8 - 7 = 1

The answer is 1-3x+8y

2*y-4*x+8+6*y+x-7 evaluates to 1-3x+8y

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Solve this equation for x. 4x-5=2x+3
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3 0
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Read 2 more answers
6. A cookie jar contains 315 M&amp;M's. There are only brown and
Romashka [77]

The system of equations representing the problem is

b+g=315\\8b-g=0

and we have 35 brown M&M's and 280 green M&M's in the cookie jar.

<h3>Formulating the equations</h3>

If we let b represent the number of brown M&M's and g the number of green M&M's, then, from the sentence

"...<em>A cookie jar contains 315 M&M's. There are only brown and green M&M's in the jar</em>..."

we can construct the algebraic equation

b+g=315

Also, from the sentence

"...<em>The number of green M&M's is 8 times that of the brown M&M's</em>..."

we can construct the algebraic equation

g=8b\implies 8b-g=0

overall, we have the system of equations with unknowns b and g

b+g=315\\8b-g=0

<h3>Solving the system of equations</h3>

Adding the two equations, we get

(b + 8b) +(g + (-g))=315+0\\9b=315\\\\\dfrac{9b}{9}=\dfrac{315}{9}\\\\b=35

Substituting this value for b into the relationship g=8b

g=8b\\g=8(35)=280

Therefore, we have 35 brown M&M's and 280 green M&M's

Learn more about word problems and systems of equations here brainly.com/question/14111058

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3 years ago
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