What is the slope of the line that passes through the points -15,-1 and -5,5

Which is an equation for the nth terms of the sequence 12,15,18,21

Alawn mower manufacturer incurs a total of 34,816 in overhead costs and 388 per lawn mower in production costs. how many lawn mowers were manufactured if the average cost of productions is 660

3. solve the given inequality and graph the solution on a number line.