Find A-1 without a calculator.A = 
A. A-1 = 
B. A-1 = 
C. A-1 = 
Answer: C
Mathematics
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Solve the problem.Prove that tan ? + cot ? = sec ? csc ? by expressing each function in terms of its x, y, and r definition.
What will be an ideal response?
Mathematics
Use unit ratios or conversion factors to change to the units indicated. Round to the nearest tenth, if necessary.407 mi to kilometers
A. 431.4 km B. 252.7 km C. 655.3 km D. 385.0 km
Mathematics
Solve the problem.A gardener is fencing off a rectangular area with a fixed perimeter of 28 ft. What is the maximum area?
A. 1.75 ft2 B. 196 ft2 C. 7 ft2 D. 49 ft2
Mathematics
Add.30 + 100 + 80
A. 21 B. 93 C. 210 D. 110
Mathematics