Amedium orange has 60 calories and a grapefruit has 80 calories. a citrus gift package contains a total of 12 oranges and grapefruit. the number of calories in the gift package is 780. how many oranges are in the package?

For this case we propose a system of equations:

x: Variable representing the amount of oranges

y: Variable that represents the amount of grapefruit

We have to meet a citrus gift package:

From the second equation we have to:

We replace in the first:

Thus, the package has 3 grapefruits.

On the other hand:

Thus, the package has 9 oranges.

9 oranges

b and c

step-by-step explanation: