A collection of dimes and nickels is worth $3.30. If there are 42 coins in all, how many of dimes are there in the collection? (with work plz) a)12

b)18

c)24

d)30

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?