2 years ago

5y-4x=-7 what does x equal

Mathematics

1 answer:

harkovskaia [24]2 years ago

4 0

Answer:

$x = \frac{5y + 7}{4}$

Step-by-step explanation:

5y - 4x = - 7

5y - 4x + 4x = - 7 + 4x [adding + 4x on both sides ]

5y + 7 = - 7 + 7 + 4x [adding 7 on both sides , - 4x + 4x = 0 ]

5y + 7 = 4x [ -7 + 7 = 0 ]

$\frac{5y + 7}{4} = \frac{4x}{4}$ [ dividing by 4 on both sides ]

$x = \frac{5y + 7}{4}$

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The width of a rectangle is 6 2/3 inches. The length of the rectangle is twice its width. What is the perimeter of the rectangle

hichkok12 [17]

A perimeter of a rectangle is:
$2(l+w)$

They give you the width, but let's convert it to an improper fraction first:
$6 \frac{2}{3} = \frac{20}{3}$

The length is twice the width so it is:
$\frac{20}{3}*2 = \frac{40}{3}$

Now, we are ready to solve, plug in values in the perimeter formula:
$2( \frac{40}{3}+ \frac{20}{3}) = 2(\frac{60}{3}) = \frac{120}{3} = 40$

So, 40 is your answer.

6 0

3 years ago

I will mark that person brainliest if they answer correctly and must be well explained

Zolol [24]

it is 180

hope this helps

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3 years ago

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