Answer:
See Explanation
Step-by-step explanation:
Required
Proportion problems
An example is:
y is directly proportional to x such that: y=4 when x = 2;
Derive the equation
For direct proportions, we have:
This gives:
Make k the subject
So:
So, the equation is:
Assume the above question is for inverse proportion
The variation will be:
This gives:
Make k the subject
So, the equation is:
The answer is C. (70).
The easiest way to explain this is to use a table. You could you other methods like by using a proportion but this way is easier.
Answer:
see explanation
Step-by-step explanation:
given
y = 3x² + 4 ( isolate the term in x by subtracting 4 from both sides )
y - 4 = 3x² ( divide both sides by 3 )
= x² ( take the square root of both sides )
= x, or
x =
To get the answer you set up a problem such as x/20=.70
x/20=.70 | Times .70 by 20
14/20=.70