Factor the expression r^2+19rs+90s^2
a: (r+3s) (r+30s)
b: (r+3) (r+30s^2)
c: (r+10s) (r+9s)
d: (r+10)(r+9s^2)

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

What is the value of x in the following equation. -x ^3/2 = -27

Aplot of land has been surveyed for a new housing development with borders ab, bc, dc, and da. the plot of land is a right trapezoid with a height of 60 feet and an opposite leg length of 65 feet