Use the quadratic formula or graphing methods to solve the inequality.4x2 + 20x + 8 ? 0

A. x ?  ? -0.438
B. x ?  ? -4.562 or x ?  ? -0.438
C. ? -4.562 ? x ?  ? -0.438
D. x ?  ? -4.562

Answer: B

Mathematics

Use Cramer's rule to solve the system of linear equations in three variables.

A. (1, 6, 1) B. (1, -6, -1) C. (2, 4, 1) D. (6, 1, 6)

View

Mathematics

Find the axis of symmetry of the given function.f(x) = -2x2 + 11x + 2

A. x = -
B. x =
C. x =
D. x = -

View

Mathematics

Solve the equation graphically, numerically, or symbolically. If appropriate, round the solution to hundredths. ?r + 1.2? = 4

A. 2.8, 5.2 B. No solution C. -2.8 D. 2.8, -5.2

View

Mathematics

Multiply.(2 + )(2 - )

A. 4x - y
B. 4x + y
C. 4x - 2 - y
D. 4x² - y²

View

Mathematics