Answer:
6
Step-by-step explanation:
15 - 3 = 12, divide that by 2 and your answer is 6.
No cause if I helmet cost $42 , 7 helmets will be $294.
$42 = 1 helmet
$? = 7 helmets
cross multiply = 42 × 7 = $294
Answer:

Explanation:

simplify the following

subtract 1 from both sides

simplify the following

multiply both sides by 1/3

simplify the following

Its 4 plus i square root of eleven