Does this table represent a linear equation?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

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

Is a triangle with sides of length 6ft, 21 ft, 23 ft. a right triangle?