1.
The base can't be negative, therefore 
.
2.
3.
I do not understand but if you deposit 85 dollars in a bank account it will most likely be positive unless you owe the bank money.
Hope I helped
Brainliest if satisfied
Answer:
5(9b + 8)
Step-by-step explanation:
Rewrite 45 as 5 * 9
Rewrite 40 as 5 * 8
= 5 * 9b + 5 * 8
Factor out common term 5
=5 (9b + 8)
I believe the correct answer would be that it has one solution which is 5. Calculating x for the quadratic equation, you will only get one value so it should be one solution. Hope this answers the question. Have a nice day.
