Which formula should be used to find the length of EF?

A) x = -

b ± b2 - 4ac

2a

B) m =

y2 - y1

x2 - x1

C) M = (

x1 + x2

2

,

y1 + y2

2

)

D) d =

(x2 - x1)2 + (y2 - y1)2

answer: i believe its b. if you sound out the sentences that sounds wrong.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%