### Solutions to Practice #1

For each collection of symbols below, determine if it is an algebraic term, expression, equation, or none of these. Explain your answer.

1. 7 ÷ x
None of these It is not clear what ÷ means between 7 and x.
2. a + bc
Expression It is an expression since it means to add b to a and to subtract c from that sum.
3. 24 = 3a + 9b
Equation Here we have two expressions set equal to one another. Note that one of those expressions is an integer.
4. 3x
Term This is a product of a constant and variable.
5. 24x2y + 5z = 12ac
Equation Here we have two expressions set equal to one another. One of those expressions is a single term, 12ac.
6. –156xwz
Term This is the product of a number, –156, and several variables, x, w, and z.

NOTE: The practices in this unit do not have detailed solutions. If you got each item on this practice correct, move on to the next unit. If you had any problems with this practice, reread the unit and try the additional practice, Practice #2, for this unit.