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3 years ago

Which value of y below is the solution to the system shown below. A) y=6 B) y=-1 C) y=-4 D) y=8

Mathematics

1 answer:

Grace [21]3 years ago

4 0

Answer:

Step-by-step explanation:

given the 2 equations

x + 2y = 27 → (1)

2x + 3y = 46 → (2)

Rearrange (1) expressing x in terms of y by subtracting 2y from both sides

x = 27 - 2y ← substitute into (2)

2(27 - 2y) + 3y = 46

54 - 4y + 3y = 46

54 - y = 46 ( subtract 54 from both sides )

- y = - 8 ( multiply both sides by - 1 )

y = 8 → D

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Solve each equation for x

nignag [31]

Answer:

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Step-by-step explanation:

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Solve for x<br>-6/5x-4=-46

Katarina [22]

Answer:

x = 35

Step-by-step explanation:

-6/5x-4=-46

Add 4 to each side

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A car traveling with a constant speed travels 150 km in 7200 seconds what is the speed

WITCHER [35]

S=d/t
S=speed
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3 years ago

Write an equation for the description.

yaroslaw [1]

Answer:

The equation for the description is: $\mathbf{123=2(2x+x)\:or\:123=6x}$

Step-by-step explanation:

We need to write an equation for the description.

The length of a rectangle is twice its width. The perimeter of the rectangle is 123 feet.

Let Width of rectangle = x

Length of rectangle = 2x (twice its width means, multiplying 2 with width)

Perimeter of rectangle = 123 feet

The formula used is: $Perimeter\:of\:rectangle=2(Length\times Width)$

Putting values and finding equation:

$Perimeter\:of\:rectangle=2(Length+ Width)\\123=2(2x+x)$

So, the equation for the description is: $\mathbf{123=2(2x+x)}$

You can simplify the equation as:

$123=2(2x+x)\\123=2(3x)\\123=6x$

Both equations can be used: $\mathbf{123=2(2x+x)\:or\:123=6x}$

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3 years ago