Answer:
The correct answer is d, there are infinitely many solutions.
Step-by-step explanation:
If the variable terms are the same and the constants are the same, the equation has infinitely many solutions.
Ex: 5(3)+5(5)=40 3+5=8
5(4)+5(4)=40 4+4=8
Hope this helps! Brainliest please!
How to get answer by Mimiwhatsup:

If the amount she saved was $6 for 20%, then the formula for finding savings would be cost*percentage.
But if you want to find the original cost, then you play with the current formula until you get this. $6/20%. Have a good one :)
<span>If you used the phone 130 minutes from 6 am to 7 pm, that would cost $13.00. 400 minutes from 7 pm to 6 am at a 10% discount would cost you $36.00. Add totals to get $49.00. Tax at 6% is 2.94. Your total bill would be $51.94.
Total bill = (0.10+0.06) x 130 + (0.10+0.06) x 400 x 0.90
= $ 51.94</span>
10 is the answer to your question