Find the difference: sqrt20-sqrt80

-2sqrt5

Step-by-step explanation:

Lets begin by simplifying the radicals.

20 can be factored into 4*5, and since 4 is a perfect square, we can take out a 2.

therefore:

sqrt20 = 2sqrt5

80 can be factored into 16*5, and since 16 is a perfect square, we can take out a 4

therefore:

sqrt80 = 4sqrt5

So finally we have, 2sqrt5-4sqrt5 = -2sqrt5

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.