<span>f(x) = ax2+bx+c, is quadratic equation
</span><span>function opening downward if the a<0,
</span><span>kf(x) = -x², a= -1<0
so the answer is </span><span>B.kf(x) </span><span>
</span>
Answer:
first one
Step-by-step explanation:
he adds 5(7) to his collection then 8(4) too and after wards he throws away 2
Answer:
4 goals per hour
Step-by-step explanation:

The unit rate would be 4 goals per hour.
Hope this helps.
Answer:
x = -9
Step-by-step explanation:
Normally 18/2 is 9, but since we’re dividing by a negative, the 9 becomes negative.
So 18/-2 is -9.
Answer:
0
Step-by-step explanation:
Sum means addition so:
-9 + 18/2
(18/2 = 9)
-9 + 9
0