Which sets include only like terms? choose all answers that are correct.
a. {12c, -25c, 1.876c, 2/9c
b. {26def, -4def, 2.92def,12/19def}
c. {-1.24rs, 17rs, 9rs, 2 4/9 rs}
d. {-11xyz, -3.07xy, -42yz, -6/17xz }

Find the commission on a $590.00 sale if the commission is 15%.

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?

(c) the diagram shows the first three shapes of a matchsticks arrangement. first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.