Answer:
12 years
Step-by-step explanation:
20-8=12
Micheal's babysitter is 12 years older than Micheal.
The answer is f(x)=x²+2x when evaluated with -3 gives you the value of 3
Answer:

Step-by-step explanation:

After removing one black marble:

The answer would be 0.25... when multiplying by 10, shift the decimal place one to the right.