Which set of expressions are not equivalent? (4a + 2) + 3 and 5 + 4a 3a + 7 +2a and 7 a + 5 0.5a + 3.5 + 4a and 3.5 + 4.5a 18a + 14 and 6a + 12 + 2 + 12a

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.

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

The actual length of side y is 22 cm. use the scale drawing to find the actual length of side x. a) 15.2 cm b) 17.1 cm c) 18.0 cm d) 28.3 cm