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Answer:
The material will be used for 24 days.
Step-by-step explanation:
Given that:
Materials made in a month = 240 tonnes
More materials to be made = 60 tonnes
Total material to be made = 240+60 = 300 tonnes
Days in a month = 30 days
Materials : Days
240 : 30
300 : x
As the production is increasing, the material will be used before 30 days.
This is an inverse proportion.
Using cross multiplication;
300*x = 240*30
300x = 7200
Dividing both sides by 300
Hence,
The material will be used for 24 days.
Answer:
y = 0.9x
Step-by-step explanation:
A movie theater sends out a coupon for 10% off the price of a ticket, so the price of the ticket with the coupon is 100% - 10% = 90% of the original price.
Let
x = original price
y = price of the ticket with the coupon
Then
x - 100%
y - 90%
Write a proportion:
Cross multiply:
Since the original price and final price are always greater than 0, then the graph of this equation is in the first quadrant (see attached diagram)
