Work out the value of ( 5 times 10 to the power of 3 ) times ( 9 times 10 to the power of 7 )

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.

Segment ab is shown on the graph. which shows how to find the x-coordinate of the point that will divide ab into a 2: 3 ratio using the formula

What is the value of x when x + 7 = 21?