Acandy store sells varieties of candy. out of these 20 varieties,12 varieties contain chocolate. what precent of the total number of varieties of candy chocolate( solve each precent, using an equation or proportional relationships)

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

Find the value of x to the nearest tenth.