If f(x) = 2x-1 what is f(4)
1 answer:
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Answer:
The weight of container C is 2.1kg.
Step-by-step explanation:
This question is solved using a system of equations.
I am going to say that:
x is the weight of container A.
y is the weight of container B.
z is the weight of container C.
The average weight of 3 containers A,B and C is 3.2kg.
This means that the total weight is 3*3.2 = 9.6kg. So
Container A is twice as heavy as container B.
This means that .
Containers B is 400 g heavier than container C.
400g is 0.4kg. So
This means that , or
Replacing y and z as functions of x in the first equation:
Container C
The weight of container C is 2.1kg.
The required equation is:
Option C is correct.
Step-by-step explanation:
The proportional relationship can be found using the equation:
where x and y are the points and k is the constant of proportionality.
We need to find k.
From the graph given, we can locate points x and y:
x=5, y= 35 then k would be:
x=10, y=70 then k would be:
For each values of x and y, the constant of proportionality k is 7
So, the required equation is:
Option C is correct.
Keywords: Proportional Relationship
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