The answer to Cindyelias82 question is 5.65685425i
Square Root (-2)+Square Root(-18)=5.65685425i
The answer is x=7. I hope this helps. Tell me if you need an explanation!
Step-by-step explanation:
If each day he increases his practice time by 20 mins then after 25 days his total practice time would be increased by 25*20 mins which is 500 mins then you add the first 40 mins you get 540. The you can figuire out the rest from there.