Question

1 poir

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.​

Answer 1

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

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!

Answer 2

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

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.