How much do 777 light bulbs cost?
Question:
At the market, 5 light bulbs cost $9. How much do 7 light bulbs cost?
Answer:
Cost of 7 bulbs is $ 12.6
Solution:
Given that,
5 light bulbs cost $ 9
Find the cost of 1 bulb
Cost of 1 bulb is found by dividing the cost of 5 bulbs by 5
Thus cost of 1 bulb is $ 1.8
Thus cost of 7 bulbs is $ 12.6
Answer:
7 bulbs equals 12.6
Step-by-step explanation:
12 inches=1 ft
x inches=7ft
12*7=x
12*7=84
it is proportional: it has a constant rate and goes thru the origin