If a dozen widgets cost 30.00 how much will 80 cost

1foot = 12 inches; 1 yard = 3 feet

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!

What is the equation of a line that passes through points (0, 4) and (-4,-8)?