The first, third and ninth terms of an A. P are the three terms of a G. P. If the seventh term of the A. P is 19, calculate i. the 20th term of the A. P
ii. the sum of the first twelve terms of the G. P ( leave your answer in index form )

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years