Determine if the given value is a solution to the equation. Answer Yes or No.3x + 2 = 31; x = 9
A. Yes
B. No
Answer: B
Mathematics
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Complete the equation so the result is an identity. 1 - 
= sin2x
A. tan2x B. sec2x C. cot2x D. cos2x
Mathematics
Find the exact value. Do not use a calculator.sin 405°
A. 
B. - 
C. - 
D. 
Mathematics
Solve the problem.The distance d in miles that can be seen on the surface of the ocean is given by 
where h is the height in feet above the surface. How high (to the nearest foot) would a platform have to be to see a distance of 18.5 miles?
A. 445 ft B. 342 ft C. 203 ft D. 142 ft
Mathematics
Use the graph to complete the identity.
= ? 
A. tan 6x B. cot 3x C. -cot 3x D. tan 3x + tan 9x
Mathematics