Answer:
5
Step-by-step explanation:
He can buy 5 boxes of light bulbs..
20 x 5= 100
He only has 120 to spend - the shipping = 110
He can't get another box of lightbulbs. Therefor he can only buy 5!
The slope of the line is y=-4x + 18 :)
Answer:
if the prodect is -1 the line are perpendicular to each other
$1.25/ (1/2 hour)= $2.50/ hour
The final answer is $2.50/hour~