Write the substitution that could be used to make each equation quadratic in u.For (4 - t)4 - (4 - t)2 + 9, use u = 
.
A. 4 + t
B. 
C. 4 - t
D. (4 - t)2
Answer: D
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Prove that the equation is an identity.(1 + tan x)2 - 2 tan x = 
What will be an ideal response?
Find the area.
A. 19
m2
B. 10
m2
C. 9
m2
D. 21 m2
Solve the inequality. Give the solution set in both interval and graph forms.-5(5x + 4) < -30x - 15
A. (-30, ?)
B. (1, ?)
C. (-?, 1)
D. (-?, -30)
Solve the problem.Penrose tiles are formed from a rhombus WXYZ with sides of length 1 and interior angles 72° and 108°. (Refer to the illustration.) A point O is chosen on the diagonal 1 unit from Y. Line segments OX and OZ are drawn to the other vertices. The two resulting tiles are called a kite (figure OXYZ) and a dart (figure OXWZ). Find the area of the kite tile and the dart tile, correct to the nearest 0.01. 
What will be an ideal response?