What is the equation of the line containing the points (-1,9) and (2,18)

Five infinity stones cost $16.80. what is the price per infinity stone ?

The price of a lawn mower is x dollars. the store is having a 75% end of summer clearance sale. which expression can be used to find the clearance price of the mower? a) .25x b) .75x c) x - .25(75) d) x + .25(75)

After john worked at a job for 10 years, his salary doubled. if he started at $x, his salary after 10 years is o $2 $x42 $x-2 $24