Solve using the quadratic formula. Use a calculator to approximate the solution to three decimal places.
x2 + 
x + 
= 0
A. ±3
B. ±0.333
C. 0.333
D. -0.333
Answer: D
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Find the intervals on which the function is continuous.y = 
- 
A. discontinuous only when x = -8 or x = -4 B. discontinuous only when x = -12 C. discontinuous only when x = -4 D. continuous everywhere
Solve the problem.The sales tax rate in one state is 5.75%. How much tax will be charged on a purchase of 6 chairs at $63 apiece? Round your answer to the nearest cent.
A. $217.35 B. $21.74 C. $3.62 D. $66.62
Determine the domain and the range of the function.f(x) = x2 + 2x
A. domain: {x|x ? -1} range: {y|y ? -1} B. domain: all real numbers range: {y|y ? -1} C. domain: all real numbers range: {y|y ? 1} D. domain: {x|x ? 1} range: {y|y ? 1}
Solve the system of equations using the inverse of the coefficient matrix.
A. x = 2, y = 3, z = 5 B. x = -2, y = -3, z = 3 C. x = 2, y = -3, z = 1 D. The system is inconsistent.