A^2 - b^2 = (a - b)( a +b);
<span>cos^4x-sin^4x =( cos^2x + sin^2x )( cos^2x - sin^2x) = 1* cos2x = co2x.</span>
First make the denominators of the fractions the same by multiplying.

×

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Now we just need to add the fractions together

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9/6 would be the answer, but it can be simplified further, then converted into decimal form.

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=1.5 yardsYour final answer is 1.5 yards of ribbon are needed.
I wrote the domain and range in interval notation, not sure if that’s how you’re asked to do it. This is how I was taught to state the domain/range of a graph.
Yes
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5 1/2 = 11/2
11/2 x 3/4 = 33/8 = 4 1/8
answer is B. 4 1/8