Answer:
Its B
Step-by-step explanation:
For each increase of 10° the amount of gas used is about 25 therms less
Answer:
He should pay $2,790.7.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time, in years.
After t years, the total amount of money is:

In this question:
Rate of 10%, so I = 0.1.
9 months, so 
How much should he pay for a note that will be worth $3,000 in 9 months?
We have to find P for which T = 3000. So



Then





He should pay $2,790.7.
Answer:
19
Step-by-step explanation:
1. x and y values written in the form (x,y)
2. {-5, -4, 2}
3. {-3, 1 , 6 }