EFG and GFH are a linear pair, EFG=2n+17 and GFH=4n+19 what are EFG and GFH?
(PLEASE HELP)

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top