Solve by completing the square.z2 + 4z - 3 = 0
A. -2 ± 2
B. -2 ± 
C. -1 ± 
D. 2 + 
Answer: B
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Use an integer to express the number.On a cloudy day, the water temperature in the swimming pool drops 2 degrees.
A. -2 B. 2
Solve the equation and express the solution in exact form.ln(2x - 1) + ln (x - 5) = ln 5
A. 
B. 
C. 
D. ?
Rationalize the denominator. Assume that all variables represent positive real numbers and that the denominator is not zero.
A. 
- 
B. 
C. 
D. 
Solve the problem.A baseball pitcher throws a baseball with an initial speed of 127 feet per second at an angle of 20° to the horizontal. The ball leaves the pitcher's hand at a height of 4 feet. Find parametric equations that describe the motion of the ball as a function of time. How long is the ball in the air? When is the ball at its maximum height? What is the maximum height of the ball?
A. x = 119.34t, y = -16t2 + 43.43t + 4 5.238 sec, 1.357 sec, 239.771 feet B. x = 119.34t, y = -16t2 + 43.43t + 4 2.619 sec, 1.357 sec, 3.997 feet C. x = 119.34t, y = -16t2 + 43.43t + 4 5.607 sec, 1.357 sec, 29.471 feet D. x = 119.34t, y = -16t2 + 43.43t + 4 2.804 sec, 1.357 sec, 33.471 feet