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Question 5
1 pts
Tina is saving to buy a notebook computer. She has two options. The firskoption is to put $300 away initially and save $20 every month.
The second option is to put $120 away initially and save $50 every month. After how many months would Tina save the same amount
using either option?

Respuesta :

nermay7

Answer:  After 6 months

Step-by-step explanation:

We can represent the first option by the equation y = 20x  + 300  where x is the number of months. The second option can also be represent by the equation  y = 50x + 120  .  

Using these equations we can solve for the months the amounts will be the same  using either option .

y = 20x +300

y = 50x + 120     substitute y into one of the equations.

20x +300 = 50x +120  

        -120             -120

20x + 180 = 50x  

-20x               -20x

      180 = 30x

   x= 6  

 

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