This is an arithmetic sequence because each term is 7 greater than the previous term, so 7 is what is called the common difference...
Any arithmetic sequence can be expressed as:
a(n)=a+d(n-1), a=first term, d=common difference, n=term number.
We know a=1 and d=7 so:
a(n)=1+7(n-1)
a(n)=1+7n-7
a(n)=7n-6
The above is the "rule" for the nth term.
Step-by-step explanation:

Count how many of the same number, since you have four 8's the exponent will be

same applies for 3
Answer:
Total rental cost is:
y = Bx + M
where x is number of additional hours, y is total cost, M is fixed fee, and B are is amount that is charged per hour.
Step-by-step explanation:
Let amount of flat fee = M
let hourly rate = B
Total rental cost = ?
As given the store charges a flat fee plus an hourly rate:
⇒ y = Bx + M
where x is number of additional hours, y is total cost, M is fixed fee, and B are is amount that is charged per hour.
Answer: It would be the second option.
Step-by-step explanation:
If angles 7 and 1 are supplementary, so are 5 and 1 because angle 7= angle 5. Supplements are not always equal. Imagine a more acute angle. One would be, say, 30, and the other would be 150. These numbers are different, so it would be the second option.