320 million written in scientific notation

Solve 2x+y=3 x+y=5 in substitution method

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.

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3