Which shows a correct plan to solve this problem?

jared was adding canned goods to his food pantry. he wanted to add 12 cans of corn and 24 cans of beans. he has 3 empty shelves. how many cans of goods is jared adding to his pantry?

a.
i just need to add the number of cans of beans and corn together and then multiply by 3.

b.
i just need to divide the number of cans of beans by the number of empty shelves (3).

c.
i just need to add the number of cans of beans and corn together and then divide by 3.

d.
i just need to add the number of cans of beans and corn together.

answer: i guess 5 units?

step-by-step explanation:

{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

$54.99

step-by-step explanation:

$54.99 includes 500 min. if she does not exceed 500 min then her bill is $54.99