What is the sum of the geometric series 20 + 21 + 22 + 23 + 23 + 24 + … + 29?
a. 1,023
b. 511
c. 2,407
d. 1,012

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

Evaluate the expression. (9 + 5)(3 + 2)0

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?