Question

how much distance does he save by doing this ?

Answer 1

i would go with none of the above because looks like its longer walk but don't take meh word for it

Answer 2

lol ok :)

Answer 3

@andrea408 The answer is not "none of the above."

Answer 4

Crank out the length of the diagonal. 30^2 + 40^2 = d^2.

The long way around is 30 + 40 = 70. Subtract the value of d you get above from 70, and you'll know which option to select.

Answer 5

I get 140 =d^2

Answer 6

if I sub. 140- 70 I get 70 but that's not one of my options.

Answer 7

How'd you get 140 = d^2?
\[30^2 + 40^2 = 900 + 1600 = d^2\]

Answer 8

yea I did it wrong.

Answer 9

2500 I get now

Answer 10

sub. 70 ? or..

Answer 11

@Directrix

Answer 12

\[\large d^2 = 2500 \], so you first have to find d.

Answer 13

how do I find d ?

Answer 14

You have d squared equal to 2500. The opposite of squaring is... taking the square root, so take the square root of both sides.

Answer 15

its 50 ?

Answer 16

Yes for the diagonal. Now, subtract that from (30+40) to get the distance saved which is the answer to the question.