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Let a(x) be the amount of money remaining on Hillary's gift card after purchasing x apps on her phone. a(x)=50-1.25x

So, a(12) =__. This means that______________, Hillary_____.
38 purchasing 12 apps has 12 new apps
35 purchasing 35 apps has $35 left
65 spending $35 has 35 new apps
15 spending $12 has $12 left

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Matheng
Given ⇒⇒⇒ a(x)=50-1.25x
a(x) be the amount of money remaining on Hillary's gift card.

x number of apps purchased on her phone


∴ a(12) = 50 - 1.25 * 12 = 35

Which mean : She have amount of total money = 50

she purchased 12 apps costs 12 *1.25 = 15 . So , she spent 15

The remaining on Hillary's gift card = 50 - 15 = 35

The correct answer is :

a(12) =35 .

This means that purchasing 12 apps , Hillary has $35 left

Answer:

Since a(12) = 35, Hillary will have 35 dollars remaining on her card after purchasing 12 apps.

Explanation:

   The given equation is a(x) = 50 - 1.25x, where x is the number of apps purchased and a(x) is the amount of money remaining on Hillary's gift card after buying x apps.

   So we substitute x = 12 in the equation to solve for a(x).                                              a(12) = 50 - (1.25 × 12) = 50 - 15 = 35.

   From this, we understand that Hillary's card was worth 50 dollars but after buying 12 apps which cost 1.25 dollars each she has a remaining of 35 dollars on her card.