Solve the equation. Simplify. If the solution is an improper fraction, write it as a mixed number.4
= n ? 4
A. n = 2
B. n = 1
C. n = 1
D. n = 1
Answer: B
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Solve.A boat moves 5 kilometers upstream in the same amount of time it moves 18 kilometers downstream. If the rate of the current is 9 kilometers per hour, find the rate of the boat in still water.
A. 9 kilometers per hour
B. 6
kilometers per hour
C. 3
kilometers per hour
D. 15
kilometers per hour
Ions are atoms or groups of atoms with positive or negative electrical charges. The charges of some ions are given. Use these values to find the total charge. 
6 calcium, 13 sodium, and 3 borate
A. +34 B. -8 C. -10 D. +16
Complete.83 km/h = 
mph (Round to the nearest thousandth.)
A. 51.543 B. 59.843 C. 125.247 D. 133.547
Find the real solutions of the equation.x5/4 - 4x1/4 = 0
A. {0} B. {0, 2} C. {0, 4} D. {-4, 0, 4}