PLEASE HELP WITH WORKING. object A is 5 kg heavier than object B.
the mass of object C is twice the mass of object A.
if the total mass of three objects is 225 kg.
find the mass of object C.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Factor the following expression. 27y3 – 343 a. (3y + 7)(9y2 + 2ly + 49) b. (3y – 7)(9y2 + 2ly + 49) c. (3y – 7)(932 – 217 + 49) d. (3y + 7)(92 – 2ly + 49)

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?