We are given here the individual costs of DVD and CD as well as the total sales and the number of items sold on one day. To solve the number of DVDs and CDs sold each, we devise two independent linear equations:
(1) x + y = 39
(2) 4x + 7y = 204
x- number of DVDs; y - number of CDs
solving, x= 23 DVDs
y = 16 CDs
73/50
146/100
146%
The answer would be 146%
First, we have to convert the fractions so that they have common denominators.
Now we add the fractions together.
Now, to find the fraction of the time that Amy spent on history, we need to subtract the sum of the time she spent in math and science from one whole.
Amy spent 5/12 of her time working on history.
The equation of the parabola that similar to f(x) =
but the vertex is (3, 5) in the standard form is y =
+ 5
The equation of the parabola
f(x) = 
The standard vertex form of a parabola is
y =
+ k
The coordinates of the vertex of a parabola = (3, 5)
Where (h, k) is the coordinates
From the given function of the parabola f(x) = 
The value of a = 7
Substitute the values in the vertex form of a parabola
y =
+ 5
Hence, the equation of the parabola that is similar to f(x) =
but the vertex is (3, 5) in the standard form is y =
+ 5
Learn more about vertex form here
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3,2 i believe is the answer