Solve the problem.The difference of the reciprocals of two consecutive integers is 1/56. Find the integers.
A. 8 and 9 or -8 and -9
B. 6 and 7 or -6 and -7
C. 28 and 29 or -28 and -29
D. 7 and 8 or -7 and -8
Answer: D
Mathematics
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A. 2.5 × 10-2 B. 2.5 × 10-3 C. 2.5 × 103 D. 2.5 × 102
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Solve the equation. Express radicals in simplest form.x2 = 49
A. 24.5 B. ±8 C. 7 D. ±7
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Use a half-angle formula to find the exact value of the expression.tan 165°
A. -
- 2
B. 
- 2
C. 
+ 2
D. -
+ 2
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Solve the system of equations using Cramer's rule.4x - 15y = 1-16x + 3y = -23
A. 
B. 
C. 
D. 
Mathematics