Sin A = 90-Cos A. And Cos A = 90-Sin A.
1 answer:
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Answer:
the cost of each cookie is
the cost of each muffin is
Step-by-step explanation:
Let
x-----> the cost of each cookie
y----> the cost of each muffin
we know that
-----> equation A
-----> equation B
Using a graphing tool
The solution of the system of equations is the intersection point both graphs
The intersection point is
see the attached figure
therefore
the cost of each cookie is
the cost of each muffin is
The discriminant is the secion inside the double parenthasees [()] below in the quadratic formulat which is
x=![\frac{-b+ \sqrt{[(b^{2}-4ac)]} }{2a}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-b%2B%20%5Csqrt%7B%5B%28b%5E%7B2%7D-4ac%29%5D%7D%20%7D%7B2a%7D%20)
the determinant determines or tells whether the answer is real or imaginary
if it is negative, then it is imaginary, if positive, then it is real
so basically the discriminmant is
so ax^2+bx+c
a=x^2-2x-15
a=1
b=-2
c=-15
subsitute
=4-4(1)(-15)=4+60=64
the discriminant is () or 64
x=
the determinant determines or tells whether the answer is real or imaginary
if it is negative, then it is imaginary, if positive, then it is real
so basically the discriminmant is
so ax^2+bx+c
a=x^2-2x-15
a=1
b=-2
c=-15
subsitute
the discriminant is (