Simplify the expression. Write your answer without negative exponents. Whenever an exponent is negative or zero, assume that the base is not zero.
A. - 
B. 
C. - 
D. - 
Answer: D
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Solve the system of equations by elimination.
A. x = 3, y = -9; (3, -9) B. x = 6, y = -9; (6, -9) C. x = 3, y = 9; (3, 9) D. x = 6, y = 3; (6, 3)
Solve.A hiking club is trying to construct a rope bridge across a canyon. A 6-foot construction pole held upright casts a 7-foot shadow. At the same time of day, a tree at the edge of the canyon cast a shadow that exactly covers the distance that is needed for the rope bridge. The tree is exactly 89 feet tall. How long should the rope bridge be? (Round to the nearest foot.)
A. 90 ft B. 623 ft C. 76 ft D. 104 ft
Solve the linear equation.-15 - (3y - 1) = 3(y + 2) + 4y
A. 
B. 
C. {-2}
D. 
Solve the problem.The sum of the reciprocals of two consecutive integers is 9/20. Find the integers.
A. 9 and 10 B. 4 and 5 C. 3 and 4 D. 5 and 6