1. The cost of an article is directly proportional to the time spent making it. An article taking 6 hours to make costs £30. Find the following:
a. the cost of an article that takes 5 hours to make
b. the length of time it takes to make an article costing £40

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Which expressions are equivalent to -7+3(-4e-3)? choose all answers that apply: choose all answers that apply: a -4(3e+4)? 4(3e+4) b 12e12e c none of the above

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table