Evaluate Expressions
5a
where a = -3
-15
x + 2 = 12
x = 5
3z + 2 = 5
z = 1
3(x-2) + 3x = 10
x = 2
What is a variable?
A letter that represents a number
3z - 4w where z = 2 and w = -1
10
y - 15 = 3
y = 18
-5s - 6 = 34
s = -8
7c - 2 + 9 = 0
c = -1
What is the black panther's name in The Jungle Book?
Bagherra
7 - 3x + 9x - 2y + y where x = 9 and y = 2
59
w + -2 = -7
w = -5
7x + 182 = -182
x = -52
6 + 2(5d - 3) = 50
d = 5
What is an integer?
A positive or negative number
-13v + 9m - 9m + 13v where v = 0 and m = -1
0
-4b = 48
b = -12
15 - 9m = 60
m = -5
5g - 7g + 3(2g + 8) = 60
g = 9
Without a calculator.....
what is 2,346 x -334?
-783,564
12z + 94x - 5y + 15y + 22x - 13z where x = -2,
y = 0 and z = -1
-231
p/3 = -24
p = -72
365 = -5 + 10c
c = 36
7w - (15w - 3) + 14 = 25
w = -1
What is the difference between an equation and an expression
An equation has an equal sign, an expression does not.