Use the quadratic formula to solve the equation. Simplify any radicals.x2 = 9 - 4x
A. {-2 ± 2
}
B. {-2 ± 
}
C. {-1 ± 
}
D. {2 + 
}
Answer: B
You might also like to view...
Solve the problem.A 20-kg mass is attached to a spring that hangs vertically and is stretched 3 m from the equilibrium position of the spring. Assume a linear spring with F(x) = kx. How much work is required to compress the spring and lift the mass 1.5 m? Round to four decimal places when appropriate.
A. 24.5 J B. 318.5 J C. 220.5 J D. 514.5 J
Use synthetic division to divide.(x2 - 16) ÷ (x - 4)
A. x + 4 B. x + 16 C. 4x + 4 D. 16x + 4
Find the equation of the hyperbola satisfying the given conditions.Vertices at (-10, 0) and (10, 0); focus at (
, 0)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Solve the problem.It costs $27 per hour plus a flat fee of $19 for a plumber to make a house call. After writing an equation for this situation, what is the total cost to have a plumber come to a house for 4 hours?
A. $108 B. $517 C. $127 D. $103