Which equation results from adding the equations in this system? x + 6 y = 9.
Negative x + 2 y = negative 15.

8 y = negative 6
8 y = 6
4 y = 24
4 y = negative 6

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%

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

only 10/60 isn't equivalent

hope this : )