Express 2log7 5 as a single logarithm

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.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?