Add or subtract as indicated. Write the answer in simplest form.
- 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve.The speeds of pulleys are inversely proportional to the lengths of their diameters. The diameter of pulley A is 18 cm and the diameter of pulley B is 8 cm. If pulley B turns at 342 rpm's, how fast does pulley A turn?
A. 749.3 rpm's B. 769.5 rpm's C. 152 rpm's D. 174 rpm's
Mathematics
Find the value of the missing number.? - 19 = -3
A. -22 B. -16 C. 16 D. 22
Mathematics
Solve the system of equations by graphing.2x - y = 3 y = 1 
A. (1, 2) B. (2, 1) C. (-2, -1) D. no solution
Mathematics
Solve the inequality.x2 + 4x ? 0
A. (-?, 0] or [4, ?) B. [-4, 0] C. (-?, -4] or [0, ?) D. [0, 4]
Mathematics