Terminology
what does the word variable mean?
a letter that represents anything/ an unknown
a number increased by 5
a + 5
a+b
7
Solve 4x + 3
if x = 10
43
4 + x + 4 + x + 4
2x + 12
what does the word coefficient mean?
the number in front of the variable
double a number
2a
2b-a
Solve x + y - 10 if
x = 4 and y = 12
6
3x - 2 + 7x + 7 - 3
10x + 2
what does the word constant mean?
a fixed value, the number on its own
a quarter of a number minus 3
1/4 times a - 3
or
a divide 4 - 3
4(b-a)
12
Solve 3x + 5y - 6 if
x = 3 and y = 5
28
13x +10 + 20x - 4
33x + 6
what is a like term?
like terms have exactly the same variable
a number subtracted from 20 then halved
(20 - a) divide 2
or (20 - a) /2
2a+2b
14
24+ 2b2 รท b
when b= 3
30
20x + 3y - 10x + 8y
10x + 11y
identify the parts of the expression.
6p - 8m + 3
coefficient: 6, -8
variable: p, m
constant: +3
a number times by itself added to a different number
a2+b
a2 +b2
29
Solve
x2 + 2x
if x=4
24
4x - x + 2x - 7y + 10x - 2x + 3
13x -7y +3