There are no real roots for a negative number, so -81 has no real roots, if the number is 81 however, then the tow roots are 9
Answer:
30 hours
Step-by-step explanation:
The equation we use is 1/15 + 1/x = 1/10. X being the amount of time it takes Ian alone. X works out to 30 hours which is the answer
Answer:
J) 
Step-by-step explanation:

Find the common denominator ^^
Answer:
B) I think
Step-by-step explanation: