F(x) = 4x - 3
f(a) = 4a-3
9 = 4a-3
4a = 12
a = 12 / 4
a = 3
_____________________
f(b) = 4b-3
5+3 = 4b
8 = 4b
b = 8 / 4
b = 2
___________________
f(a+b) = 4(a+b) - 3
f(a+b) = 4(3+2) - 3
f(a+b) = 4(5) - 3
f(a+b) = 20 - 3
f(a+b) = 17
<h3>Inequality</h3>
75d + 30c ≥ 255
<h3>Examples</h3>
(1) If someone bought five DVD players and ten cordless telephones, the equation ((75)(5)+(30)(10)≥255) would be true.
(2) If the electronic store had a parcticularly bad day and they sold two DVD players and one cordless telephone, the equation ((75)(2)+(30)(1)≥255) would be false.
The opposite of -1/2 is 1/2. If you put -1/2 in absolute value, then the answer is 1/2.
Just do length x width x height
