At a party store, packages of 12 noise makers are $2 each. Packages of 9 party hats are $15 each. Mia wants to buy equal numbers of noisemakers and hats. What is the least amount of money Mia can spend?

How do you answer this question? (step by step)

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap