The expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 5 unit and the width is fraction 1 over 5 unit, what is the perimeter of the rectangle in units?

Hello!

You use the expression 2(l + w) and put in the values you know

length is 2/5

width is 1/5

You put this into the equation

2(2/5 + 1/5)

Do what is in parenthesis first

2(3/5)

multiply

2 * 3/5 = 6/5 = 1.2

The perimeter is 1.2 units 

Hope this helps!

a - base

b - exponent

so,

the base is 8the exponent is 3the exponent tells you to multiply 8 together three timesthe expanded form is 8*8*8