What is the midline of the following sinusoidal functions? 1. f(x)=3 cos 2π x+1

2.f(x)=sin 2x-2

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How do you use the elimination method for this question? explain, because i really want to understand!

Proportions in triangles solve for x

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint