<span>A = 157, B = 23
The definition of supplementary angles is that they add up to 180 degrees. So A+B = 180. And A = 7B - 4.
So write down the formula
A + B = 180
Substitute the formula for A in terms of B
7B - 4 + B = 180
Combine terms
8B - 4 = 180
Add 4 to both sides
8B = 184
Divide both sides by 8
B = 23
Now calculate A in terms of B
A = 7B - 4
A = 7 * 23 - 4 = 161 - 4 = 157
Verify that A and B add up to 180
157 + 23 = 180</span>
X = girls
y = boys
z = students in the bus
x + y = z
x + y = 36
total girls = 2 * total boys
x = 2 * y
2y + y = 36
3y = 36
y = 12
x = 2y = 24 (B)
The GCF for the first one is 4
The GCF for the second one is 4
The GCF for the third one is 2
The GCF for the fourth one is 4
The GCF for the fifth one is 2
The GCF for the six one is 2
<span>x y
-3 1
1 3
3 4
5 5
is your answer</span>
Functionally equivalent. Their<span> truth tables are the same.</span>
