Find the exact value of the expression using a sum, difference, or double-angle identity.cos 

A.
B. -( - 1)
C. ( - 1)
D. - 

Answer: A

Mathematics

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Collect like terms and write in descending order.3y9 + 9y8 - 6y5 + 4

A. 6y22 + 4 B. Can't be simplified  C. 10y22 D. 3y9 + 9y8 - 6y5

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Provide an appropriate response.Solve the fractional equation, identifying excluded values if any.x + x = 

A.
B. 1
C. 1, x ? 2
D. , x ? 0

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Solve.Find the discount when the original price is $307.50 at a discount of 30%.

A. $9.23 B. $92.25 C. $215.25 D. $298.28

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Find the slope of the line containing the two points.(-9, 3); (-9, 1)

A.
B. -2
C. 0
D. undefined

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