Find the 11th term of the geometric sequence 6, -18, 54

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Acaterer charges $500 plus $30 per guest to cater a wedding. walt and traci don't want to spend more than $8000 on catering. write and solve an inequality in terms of the number of guests, g, that can be invited. a) 30g ? 8000; g ? 267 b) 500g < 8000; g < 16 c) 500 + 30g < 8000; g < 250 d) 500 + 30g ? 8000; g ? 250

What is the sum of 25x + 15y and (-18x - 6y)