Parts of an expression
In the expression 4x + 7, what is the variable?
x
Find the value of x+4 when x=3.
7
Are 3x and 8x like terms?
Yes
Simplify 3x+2x.
5x
Write an algebraic expression for “a number x plus 5.”
x+5
In the expression 6a−9, what is the constant?
Find the value of 5a when a=4.
20
Are 5a and 5b like terms?
NO
Simplify 7a−3a.
4a
Write an algebraic expression for “three times a number n.”
3n
In the expression 5m+3, what is the coefficient of m?
5
Find the value of 3m−2 when m=5.
13
Which term is like 7m: 4m, 4n or 4m2?
4m
Simplify 4m+3+2m.
6m+3
Write an algebraic expression for “8 less than a number m.”
m - 8
How many terms are in the expression 3x+7y−4?
3 terms
Find the value of 2x+3y when x=4 and y=2.
14
List the like terms in 3x+5y+8x−2.
3x and 8x
Simplify 8x+5y−3x+2y.
5x+7y
Write an algebraic expression for “twice a number x, then add 7.”
2x+7
Identify the coefficient, variable and constant in 12p−8.
Ce: 12, V: p, C: 8 (or -8)
Find the value of 3a2−4 when a=3.
23
Explain why 6p and 6p2 are not like terms.
The variables have different powers.
Simplify 6a−4+3a+9−2a.
7a+5
Write an algebraic expression for “5 less than three times a number p.”
3p−5