Answer:
1st option
Step-by-step explanation:
X/0.5 = 24
X/0.5(0.5) = 24(0.5)
X = 12
No cause if I helmet cost $42 , 7 helmets will be $294.
$42 = 1 helmet
$? = 7 helmets
cross multiply = 42 × 7 = $294
Solution:
Given:

Since b and d are nonzero elements, then it is the product of two rational numbers.
Multiplying two rational numbers produces another rational number.
Therefore, the product is a rational expression.
OPTION C is the correct answer.