Simplify the expression.a4
A. Exponent: 4, base: -a
B. Exponent: 4, base: a
C. Exponent: -4, base: a
D. Exponent: a, base: 4
Answer: B
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Use the vertex formula to find the vertex of the quadratic function.f(x) = 5x2 + 10x - 4
A. (1, 11) B. (-1, -9) C. (2, 36) D. (-2, 6)
Solve the problem.One half of a number is 3 more than one-sixth the same number. What is the number?
A. 8 B. 18 C. 9 D. 12
Expand.(x - 
)5
A. x5 - 5x4
+ 70x3 - 70x2
+ 245x - 49
B. x5 - 5x4
+ 7x3 - 70x2
+ 245x - 49
C. x5 - 5x4
+ 70x3 - 70x2
+ 49x - 49
D. x5 - 5x4
+ 70x3 - 70x2
+ 245x - 49
Craig is an accident reconstructionist. He arrives at an accident where there are 4 skid marks of different lengths. He finds their measures to be 85 ft, 92 ft, 88 ft, and 90 ft. It is an asphalt road with a drag factor of 0.8. Because he does not know the efficiency of the driver's brakes, he assumes a brake efficiency of 80%. What is the minimum speed the driver could have been going?
A. 31.6 mph B. 38.2 mph C. 41.3 mph D. 46.2 mph