The length of a rectangle is twice its width. The perimeter of the rectangle is 30 cm. What are the length and width? a) Set up the variables: Let represent the width; Then will represent the length. b)What is the equation that represents the above situation? c)solve the equation d)the length and width are?

Step-by-step explanation:

a) Set up the variables:

Let x represent the width; Then 2x will represent the length.

b) What is the equation that represents the above situation?

Use perimeter formula:

As we set up w = x and l = 2x, and we know that the perimeter is 30 cm, we can build an equation by substituting the values we know or set up:

c) solve the equation

d) the length and width are?

76%

step-by-step explanation:

24% are dogs and the remaining is 76% because 100-24=76

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!