A jewelry box containes 3 rings, 7 necklaces, 4 earrings, 5 braceletes and 1 tiara. If 1 piece of jewlery is selected at radom, which two statements are true? a it is just as likely as not that a ring or necklace will be selected.
b It is impossible that a tiara will be selected.
c It is certain that a necklace will be selected.
d It is likely that earrings or a bracelet will be selected.
e it is unlikely that a tiara will be selected.

C and D

Step-by-step explanation:

Hope this helps!

A and E

Step-by-step explanation:

A because there are 3 rings and 7 necklaces, so there is a high chance they will be picked. But because there are earrings, braceletes, and one tiara, its not 100% cirtain that the rings or necklaces will be picked.

E because there is only one tiara. There are way more of all the other pieces of jewelry. But if its a choice to be picked there is a small chance it could be chosen.

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1