Upload
stephanie-moore
View
216
Download
1
Tags:
Embed Size (px)
Citation preview
ALGEBRAIC EXPRESSIONS
Step 1 Write the problem.
Step 2 Substitute in the values for the unknown (variable).Step 3 Use PEMDAS (remember to go left to right).
Show all steps!
TermsTerms
Algebraic Expression-Algebraic Expression- A A mathematical phrase involving at mathematical phrase involving at least one variable. Also can contain least one variable. Also can contain numbers and operation symbols.numbers and operation symbols.
Coefficient-Coefficient- The number multiplied The number multiplied by the variable.by the variable.
Constant-Constant- The number that does not The number that does not change or lose its value in an change or lose its value in an expression.expression.
EXAMPLE OF TERMSEXAMPLE OF TERMS
30n+6 30n+6 algebraic algebraic expressionexpression
30 is the 30 is the coefficientcoefficientn is the n is the variablevariable6 is the 6 is the constantconstant
Problem #1
Given the formula P = k2 w,
find P if k = 5 and w = -3.
Problem #2
If V = lwh, what is the value of V when l = 2, w = 3, and h = 4x?
Problem 3
If x = 1 and y = -2,which expression has avalue of 3?1. x = y 2. x - y3. xy 4. y - x
Problem #4
If a = 1 and b = -2,find the value of (a+b)2.
Problem #5
Use the formula V = x 2h, to find V when x = 6 and h = 2.
Problem #6
Evaluate the expression
(6a)2b
if a = 2 and b = -1.
Problem #7
Find 3a - 4b
if a = -2 and b = 1.
Problem #8
Find the value of (x2 - 5x + 4)
if x = 7.
Problem #9
Evaluate 5a2 - b when a = -2 and b = 3.
Problem #10
Find the value of the expression 3x3
when x = -2
Problem #11
What is the value of
r2s if r = 5 and s = -2?
Problem #12
Evaluate the expression
3x2 + y
if x = 1 and y = -3.
Problem #13
Find the value of the expression 2xy3
if x = 3 and y = -2.
Problem #14
Find the value of 5x2 if x = -3.
Problem #15
If x = -3 and y = 2, find the value of (xy)2.
Problem #16
If x = 3 and y = -2,
find the value of 4xy2.
Problem #17
Find the value of
3(ab)0
if a = 2 and b = -1.
Problem #18
Evaluate 2x2y
if x = 3 and y = -1.
Problem #19
Find the value of a2 – b
if a = 3 and b = -4.
Problem #20
Find the value of
a2b – ab2
if a = 3 and b = -4.