Ocie's electricity costs (y) per day of usage (x) are modeled below. How much is the electricity bill it Ocie is on vacation all month and doesn't use electricity?
y=85x + 7

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.

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

Answer! if you don’t mind, can you explain