Answer:
2 hours
Step-by-step explanation:
Let's denote the amount of time we need to find out, t.
=> 600 + 50t < 500 + 100t
or 600 - 500 < 100t - 50t
or 100 < 50t
or 100/50 < t
or t > 2
=> After 2 hours, company B will be cheaper option than company A
Answer:
x=-1
Step-by-step explanation:
The answer to the question is C
Answer:
7
Step-by-step explanation:

I hope it helped you
She can expect to pick a black marble 125 times