The length of a rectangle is 5 cm more than its width, the
perimeter is five times the width. what are the dimensions
of the rectangle?

We have to form an equation:

Let 'w' be the width

As the length is 5 more than the width, it can be written as 'w + 5'

The perimeter is 5 x w, this can be written as '5w'

Now we may form our equation:

w + w + w + 5 + w + 5 = 5w

[As you can see, I have used 2 of each value. this is due to perimeter being the sum of all sides]

Simplify the equation:

4w + 10 = 5w

-4w from both sides:

w = 10

l = 5 + 10

l = 15

Thus, the width is 10cm and the length is 15cm.

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you never say the total so we cant find the percentage used for petrol

step-by-step explanation:

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x