5) -7x - y = 13 8x + y = -14​

Step-by-step explanation:

im guessing this is a system of equations so:

-7-y=13

8x+y=-14

so you can cancel them, out by adding

after you do the math you should get x=-1

substitute for y and you get  y=-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%