Choose all of the following equations that have a vertex that is the maximum point of the parabola. more than one answer may be chosen.

y = −4x2 + 8x − 19
y = 3x2 + 9x − 4
y = 8x2 − 6x + 128
y = −x2 − 7x + 1

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?

What are the solutions of the system? y = x^2 + 2x +3y = 4x - 2a. (-1, -6) and (-3, -14)b. (-1, 10) and (3, -6)c. no solutiond. (-1, -6) and (3, 10)