ONLY RIGHT ANSWERS. If the value of a in the quadratic function f(x) = ax 2 + bx + c is -2, the function will.
open down and have a minimum
open up and have a maximum
open down and have a maximum
open up and have a minimum

Open down and have a maximum

Step-by-step explanation:

A negative a value will reflect the curve (it's a parabola) So after getting flipped over, the curve will have a highest point(a maximum); it opens downward (the shape of an arch or the path of a tossed ball)

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

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