The price of a 6-minute phone call is 1.80. What is the price of a 12-minute phone call?
2 answers:
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Quadratic form is given in the form
, where a, b, and c are constants
We substitute the value (8, 12) and (5,3) in turn
... Equation 1
... Equation 2
Equation 1 - Equation 2 gives
, we call this Equation 3
We also know that (5, 3) is the turning point of the curve, where the value of
is given by 
Substitute
... Equation 4
Substitute Equation 4 into Equation 3
Now we need to work out the value of
and 
Substitute back into equation 4
Substitute and into either equation 1 or equation 2
Hence the equation of the quadratic curve is
We substitute the value (8, 12) and (5,3) in turn
Equation 1 - Equation 2 gives
We also know that (5, 3) is the turning point of the curve, where the value of
Substitute
Substitute Equation 4 into Equation 3
Now we need to work out the value of
Substitute
Substitute
Hence the equation of the quadratic curve is
Answer:
We are given that Joel has 24 sports trophies, of the 24 trophies there are 1/8 soccer trophies.
1/8 of 24 is 3.
24 divided by 8 = 3 soccer trophies
There are 3 soccer trophies all the rest of the trophies, which is 21 trophies, will be other sports. 21 trophies + 3 soccer trophies = 24 trophies in total
Step-by-step explanation:
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