Vocabulary
Equations
math sentence that has an equal sign
What order should this problem be solved in?
60 / 2 - 3(15 - x) when x = 12
Replace the variable with a number
Parentheses ( subtraction in them)
Division
Multiplication
Subtraction
Evaluate the following when x = 5
x3 + 4x + 6
151
3a - 21
3(a - 7)
16 ( 2x + 3)
32x + 48
math sentence that does not have an equal sign
-24
Solve: 52 + m = 104.7
m =52.7
48x - 36y
12 (4x - 3y)
-2 ( -x +3)
2x - 6
Variable
a letter or unknown that represents one or more values
Solve: x + 45.25 = 55.06
x = 9.81
Use the distributive property:
5(8x + 4y)
40x + 20y
100a + 20b - 5c
5(20a + 4b - c)
2(4x - 3)
8x - 6
Term
a variable, constant or combination of a number and variable
Which has fewer terms and why?
A. 56xy - 7x + 63
B. 94xy + 5x - 2y - 74
A, answers may vary. Main point: A has 3 and B has 4
Which expression has a coefficient of 7?
A. x + 7
B. 7x
C. 7(2x + 1)
D. 8m = 56
Only B
7x - 42
7(x - 6)
25( x - 5y + 2)
25x - 125y + 50
The number by which the variable of a term is multiplied
Coefficient
y = x + 6, If x =17 what is y?
23 = y
Write an expression for: Willie had 35 baseball cards in his collection. He received x more for his birthday.
x + 35
26 + 104y
26( 1 + 4y)
-9 + -2( -2x - 3)
4x - 3
Shenanigans
silly or high-spirited behavior; mischief.
Four nights ago Jason read p pages in the new book by his favorite author. The next night he read p + 20 pages, and the night after that he read 38 pages. Last night Jason read p + 15 pages. Write an expression for the amount of pages Jason read total.
All are correct:
A. 3p + 73
B. P + P + P + 15 + 38 + 20
What does it mean to evaluate and expression?
Solve a math sentence with no equal sign :)
56x + 63y
7 (8x + 9y)
- x - x(x - 2)
-x2 + x