Solve the system of equations by the substitution method.
A. (7, -1)
B. (1, -7)
C. infinite number of solutions
D. no solution
Answer: C
Mathematics
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Determine the position of the hand relative to the shoulder by considering the robotic arm illustrated in the figure. Round the answer to the nearest tenth.? = 13°, ? = 73°
A. (17.1, -27.7°) B. (17.1, -62.3°) C. (17.1, 27.7°) D. (17.1, 62.3°)
Mathematics
Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km. Find the latitude of Winnipeg, Canada if Winnipeg and Austin, TX, 
, are 
apart.
A. 60°N B. 50°N C. 20°N D. 70°N
Mathematics
Find the present value. Round to the nearest cent.
A. $4182.06 B. $19,802.32 C. $1931.84 D. $1817.94
Mathematics
Graph the quadratic equation by finding and plotting ordered pair solutions.y = -2x2 
A. 
B. 
C. 
D. 
Mathematics