Answer:

Step-by-step explanation:
in the equation given these are the values:
a=1 b= -5 c= -7
if we plug this in the quadratic formula 
this is simplified to 
hope this helped
I know right
Step-by-step explanation:
Answer:help with what???
Step-by-step explanation:
The answer is c not D you are welcome
Answer:
2 dollars and 10 cents
Step-by-step explanation: 21 dimes divided by 10 is 2.1 so it will be 2 dollrs and 10 cents.