Im trying to figure out what the constant of proportionality is for this problem- Cathay bought 2 jars of sauce for 3$.
2 answers:
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Step-by-step explanation:
done
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Answer:
50 cm² and 56 cm²
Step-by-step explanation:
The area (A) is calculated as
A = × d₁ × d₂ ( d₁ and d₂ are the length of the diagonals )
(2)
A = × (8 + 2) × (5 + 5)
= 0.5 × 10 × 10
= 5 × 10
= 50 cm²
(3)
A = × (12 + 2) × (4 + 4)
= 0.5 × 14 × 8
= 7 × 8
= 56 cm²
The equation to represent the relationship between x and y is y = 15 - 3.6x .
In the question ,
it is given that
fuel used by jetliner per hour = 3600 gallons
fuel available in the jetliner = 15000 gallons
Given that y represents the amount of fuel remaining in the tank after x hrs.
As the unit of y is in thousands of gallon
So , according to the question
the equation becomes ,
y = 15 - 3.6x
For plotting the graph
Substitute x= 1hr , y = 11.4 , (1,11.4)
x = 2 , so y = 7.8 , (2, 7.8)
x = 3 , so y = 4.2 , (3,4.2)
x = 4 , so y = 0.6 , (4,0.6)
Therefore , the equation is y = 15 - 3.6x , the graph of the equation is drawn below .
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