1
Evaluate the expression,
8(4x7)
88
Evaluate the Expression
z=10 x=6 y=2
z+y/x2
3(5+7)
36
z=7
z+5
12
y=83
y+17
100
The sum of x and 10
10+x
Simplify your like terms in this algebraic expression: 7y + 6 - 1 + 12y
19y+5
Jim is z years old. His brother is 4 years older. What is an algebraic expression for his brother's age?
(z+4) years old
The quotient of w and 8
w/8
The product of 4 and p
4xp
The difference of 3 times a number, n, and 7
3n-7
Divide m by 7, and then subtract 4 from the quotient
m/7-4
Evaluate x + x + 5 when x=7
19
Evaluate 5y - 8 when y=3
7
Evaluate 33 - 7w + 6 when w=4
11
What is an expression?
A mathematical phrase that contains operations, numbers, and/or variables.
What does it mean to "substitute a value"?
When you replace each variable with a given number.
What are the four steps in the Order of Operations?
1. parentheses
2. exponents
3. multiplication or division
4. addition and subtraction
[PEMDAS]
What is a variable?
A letter, symbol or shape used to stand for an unknown value.
Evaluate 2a + 3b when a = 6 and b = 3
21
Evaluate 2(x - y) when x = 7 and y = 3
8
Evaluate 0.4x + 1.5y when x = 3 and y = 4
7.2
At the local bakery, cupcakes cost $3.25 and cookies cost $2.10 each. Write an expression to represent the cost of buying x cupcakes and y cookies.
3.25x + 2.10y
A plant starts at a height of 4 inches and grows at a rate of 3 inches per month. Write an expression to represent the height of the plant after m months.
4+3m
While playing a video game, you score p game points and b triple bonus points. An expression for your score is p +3b. What is your core when you earn 245 game point and 20 triple bonus points.
305