Writing algebraic expressions
Write an expression for the product of 3 and w.
What is 3w?
3a-2 when a=7
3(7)-2 = 19
Evaluate when p = 6. p + 9
What is 15?
10 +5x Where x= 0
10
This is a letter or symbol that represents an unknown value in an algebraic expression.
Variable
Write an expression for w less than 8.
What is 8 - w?
p/4 + 3 when p = 24
24/4 + 3 = 9
Evaluate the expression for 31 - g when g is 3.
What is 28?
12x +21 Where x = 1/2
27
These are the numbers that are multiplied by the variables in an algebraic expression.
Coefficient
Write an expression for the difference of twice p and 9.
What is 2p - 9?
7(n+4) when n=8
7(8+4) = 84
Evaluate the expression for 4w when w is 13.
What is 52?
12x + 3y where x = 1 and y = -5
These are the parts of an algebraic expression that are separated by addition or subtraction signs.
Twice the difference of 6 and x
2(6-x)
(30/b) + 9 when b =6
(30/6)+9=14
Evaluate the expression 2rz - 9 when r is 2 and z is 5.
What is 11?
12x + 7y + 23z - 17r where x= 1 y=3 z=-1 and r= -3
61
This is a term in an algebraic expression that has no variable part; its value remains the same.
Constant
Write an expression for the difference of r and 8 times 9.
What is the difference of 9(r - 8) or (r - 8) * 9?
(24/4 -c) * a when a=5 and c=1
(24/4 - 1) * 5 = 25
Evaluate the expression 3(x + 4) - w, when x is 3 and w is 8.
What is 13?
23 - 1/2z (17y) where z= 236 and y= 13
-26055
In the expression 3x² + 5y - 7, identify the coefficient/coefficients
3 and 5