Quadrilateral ABCD is inscribed in a circle with ?B opposite ?D. If m?C = 75° , find m?A.
What will be an ideal response?
105°
Mathematics
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Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Mathematics
Solve the problem.An economist predicts that the buying power B(x) of a dollar x years from now will decrease according to the formula B(x) = 0.61x. How much will today's dollar be worth in 7 years? Round the answer to the nearest cent.
A. $0.03 B. $4.27 C. $3.28 D. $0.71
Mathematics
Divide and simplify.
÷ 
A. 
B. 
C. 
D. (z + 3)(z - 8)
Mathematics
For the following equation, graph y = f1(x) and y = f2(x) on the same screen on your calculator. From the graphs, make a conjecture as to whether the equation is an identity. If so, prove your conjecture.
= 
What will be an ideal response?
Mathematics