8. Choose the steps to take to solve this equation for x. -x + 7 = 18

a) add x to both sides, then add (-18) to both sides
b) add (-7) to both sides
c) add -x to both sides then add 18 to both sides
d) add –x to the left, subtract 18 from the right

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex