Sam downloaded four applications for $2.99 each to her cell phone. The remaining applications that Sam purchased cost $1.99 each.

If she downloaded x total applications, which of the following equations can be used to find how much Sam spent on cell phone application downloads?

A: y = 11.96(x - 4) + 1.99
B: y = 1.99x + 11.96
C: y = 11.96x + 1.99
D: y = 1.99(x - 4) + 11.96

D. 1.99(x-4) + 11.96

Because you can figure out the total cost of the four costing $2.99 (11.96), that has to be added to the other half of the equation. Simply multiplying 1.99 by x would include all apps instead of just the remaining (x-4).

Or you could say that each costs $1.99 with the first 4 costing a dollar more

so ..

y =1.99x + 4

that would be the simplest equation,
Too bad they don't have it

To find out how much Sam spent on cell phone application downloads, we need to calculate the cost of the four applications that cost $2.99 each, as well as the cost of the remaining applications that cost $1.99 each.

The cost of the four applications that cost $2.99 each can be calculated by multiplying the cost per application ($2.99) by the number of applications (4). This gives us 4 * 2.99 = $11.96.

The cost of the remaining applications that cost $1.99 each can be calculated by multiplying the cost per application ($1.99) by the number of remaining applications (x - 4). This gives us (x - 4) * 1.99.

To find the total amount that Sam spent on cell phone application downloads (y), we need to add the cost of the four applications that cost $2.99 each to the cost of the remaining applications that cost $1.99 each. This gives us the equation y = 11.96 + (x - 4) * 1.99.

Therefore, the correct equation is D: y = 1.99(x - 4) + 11.96.