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The height of a hovercraft in meters is modeled by the equation f(x) = -x^2 + 5x + 24, where x is the time in minutes. How long after takeoff did the hovercraft land?
8 minutes
The height in feet of a tennis ball thrown from the roof is modeled by the equation f(x) = -16(x - 2)^2 + 45. How many seconds passed before the ball started coming back down??
2 seconds
The height in feet of a tennis ball thrown from the roof is modeled by the equation f(x) = -16x^2 + 20x + 31. How high was the roof?
31 feet
The height in feet of a tennis ball thrown from the roof is modeled by the equation f(x) = -16(x - 2)^2 + 45. What was the highest the ball went?
45 feet
Which function has the same y-intercept as the one in the graph? __ A. y = x^2 - 3x + 2__B. y = -2x^2 + 11x - 1 C. y = 4x^2 + 5x - 9__D. y = -x^2 + 6x - 4
B. y = -2x^2 + 11x - 1
Which function has the same y-intercept as the one in the graph?_ A. y = x^2 - 3x + 2__B. y = -2x^2 + 11x - 8 C. y = 4x^2 + 5x - 9__D. y = -x^2 + 6x - 4
D. y = -x^2 + 6x - 4
What is the y-intercept for y = x^2 - 19x + 3
(0, 3)
What is the y-intercept for y = -5x^2 + 14x - 47
(0, -47)
(3i)(-11i)
33
Which equation matches the graph? A. y = x^2 + 4x + 3__B. y = x^2 - 5x + 3 C. y = x^2 + 3__D. y = x^2 + 5x + 3
A. y = x^2 + 4x + 3
Which equation matches the graph? A. y = x^2 + 4x + 3__B. y = x^2 - 5x + 3 C. y = x^2 + 3__D. y = x^2 + 5x + 3
B. y = x^2 - 5x + 3
Write the equation for the axis of symmetry for y = x^2 + 1 .
x = 0
Write the equation for the axis of symmetry for y = x^2 + 5x + 1
x = -5/2
(-8i)(-2i)
-16