How much potassium chlorate would dissolve in 200g water at 20 Celsius ?

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.

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared