What is the difference of f and g?

f (x) = - 20x g (x) = 2x+9

a. (f-g) (x) = 22x+9

b. (f-g) (x) = 18x+9

c. (f-g) (x) = - 22x+9

d. (f-g) (x) = - 22x-9

What is 3 divided by 3/5?

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Use the tangent to find the unknown side length

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Reduce the fraction 100/525 to its simplest form, if possible.