A
1) 6x-4y
term= 6x,4y
coefficient= 6,-4
variable= x,y
2) 2ab+3a-b+8
term= 2ab, 3a,b,8
coefficient= 2,3,8
variable= a,b,ab
constant= 8
3)-m+n-5
term= m,n,5
variable= 6
coefficient= 1,1
constant= 5
4) r - 7
term= r,7
coefficient= 1
variable= r
constant= 7
5) s + 2r - 6
constant= 6,2
variable= s,r
coefficient= 1,2
term= s,2r,6
B
1) 8m-21; m= 4
8(4)-21
=11
2) 7(2x-6); n= 8
7(2(8)-6)
7(16-6)
7(10) = 70
3)18-2y; y=3
18-2(3)
18-6
=12
4)10y-9; y=5
10(5)=9
50-9
=45
5)12a-4(a+3); a=5
12(5)-4(5+3
60-4(8)
60-32
=28
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Answers & Comments
A
1) 6x-4y
term= 6x,4y
coefficient= 6,-4
variable= x,y
2) 2ab+3a-b+8
term= 2ab, 3a,b,8
coefficient= 2,3,8
variable= a,b,ab
constant= 8
3)-m+n-5
term= m,n,5
variable= 6
coefficient= 1,1
constant= 5
4) r - 7
term= r,7
coefficient= 1
variable= r
constant= 7
5) s + 2r - 6
constant= 6,2
variable= s,r
coefficient= 1,2
term= s,2r,6
B
1) 8m-21; m= 4
8(4)-21
=11
2) 7(2x-6); n= 8
7(2(8)-6)
7(16-6)
7(10) = 70
3)18-2y; y=3
18-2(3)
18-6
=12
4)10y-9; y=5
10(5)=9
50-9
=45
5)12a-4(a+3); a=5
12(5)-4(5+3
60-4(8)
60-32
=28