Answer:
A.
Step-by-step explanation:
A quadratic inequality looks like a quadratic equation, but with signs
<, >, ≤, or ≥
instead of sign =
You are given one equation (the first one, because the sign is =) and two inequalities (the last two beacause the signs are < and > respectively).
Thus, correct option is A,

is not a quadratic inequality (it is a quadratic equation)
Answer:
D
Step-by-step explanation:
12x + 6y = 24
Subtract 6y on both sides.
12x = 24 - 6y
Divide 12 into both sides.
x = 24/12 - 6/12y
x = 2 - 1/2y
Answer:
Step-by-step explanation:
The sum can be indicated by putting plus signs between the angle values:
5y +2y +2y
It can also be expressed as the simplified form of this expression:
9y
Answer:
$168
Step-by-step explanation:
28x6
= 168