Step-by-step explanation:
f(0)=-2(0)-9=0-9=-9
f(1/2)=-(1/2)-9=-1/2 -9=-19/2
f(-2)=-2(-2)-9=4-9=-5
Answer:
31000 dollars were invested at 4% interest rate.
16000 dollars were invested at 5% interest rate.
Step-by-step explanation:
Convert the interest rate into decimal and then write down two equations to solve for the unknowns.


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36.64-21=15.64
15.64-6.14=9.5
The answer is she made $9.50 worth in local calls last month
I honestly don't know if this is correct but it might be i think its the middle one y=f(x)=x to the second power