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Elizabeth's tablet has a combined total of 20 apps and movies. Let x

represent the number of apps and y represent the number of movies.

Which of the following could represent the number of apps and movies on

Elizabeth's tablet? Select all that apply.

The given options are:

(A) x+y = 20 (B) 7 apps and 14 movies (C) x-y = 20 (D) y=-x + 20 (E) 8 apps and 12 movies (F) xy = 20

Answer:

(A) x+y = 20 (D) y=-x + 20 (E) 8 apps and 12 movies

Step-by-step explanation:

If Elizabeth has a combined total of 20 apps and movies.

Where:

Number of apps=x

Number of Movies = y

Then:

Their total,

x+y=20 (Option A)

If we subtract x from both sides

x+y-x=-x+20

y=-x+20 (Option D)

In Option E

8 apps and 12 movies add up to 20. Therefore, this could also apply.

y = - x+20 and 8 apps and 12 movies

Step-by-step explanation:

Just took the test and these two were the only two that were right. I don't know why x+y=20 was not correct but it wasn't. Good luck!