Factor the perfect square trinomial.x2 - 10x + 100
A. (x + 10)(x - 10)
B. (x + 10)2
C. (x - 10)2
D. prime
Answer: D
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Solve.A bridge constructed over a river has a supporting arch in the shape of a parabola. The length of the road over the parabolic arch is 300 feet and the maximum height of the arch is 126 feet. Write the equation of the arch.
A. y = x2 + 126
B. y = 
x2 + 126
C. y = -x2 + 126
D. y = - 
x2 + 126
Solve the problem.A farmer has 1500 feet of fence with which to fence a rectangular plot of land. The plot lies along a river so that only three sides need to be fenced. Estimate the largest area that can be fenced.
A. 337,500 ft2 B. 281,250 ft2 C. 421,875 ft2 D. 225,000 ft2
Write the number as a product of primes.84
A. 2 ? 2 ? 3 ? 5 B. 2 ? 2 ? 2 ? 3 ? 7 C. 2 ? 2 ? 3 ? 7 D. 2 ? 3 ? 7
Solve the equation.
+ 9 = 10
A. -1 B. no solution C. 361 D. 1