NEED HELP ASAP 50 POINTS PLEASE
A Picture would help most!!

The product of (7x-2) and (20-3x)/4. when x=4

Which problem would you use the following proportion to solve for? 24/x = 40/100 a. what is 40% of 24? b. what percent is 24 of 40? c. twenty-four is 40% of what number? d. forty percent of 24 is what number?

Systems of linear equation problem. with the wind a cyclist rode 24 miles in three hours. she returned in twelve hours against the wind. find the rate of the cyclist without wind and the rate of the wind.