First just do $349 times .70 to get 244.3 because .70 +.30 =1 so 100% of the price. Next take the 244.3 and multiply it by .85 and get 207.655 and round to $207.66.
4(1.75y−3.5)+1.25y
. First multiply through with 4 the numbers in the parentheses.
7y➖ 14 ➕ 1.25y
add 1.25y to 7y
That will be 8.25y
So the answer will be 8.25y ➖ 14