<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:
10
Step-by-step explanation:
1)
15 > -2x-9
15+9 > -2x
24÷(-2) < x (the sign flips because you divide both sides by a negative number)
Hence, x > -12
2)
3x + 8 < 29
3x < 29-8
3x < 21
x < 7 (tada the answer)
Answer:
the answer is going to be -44
Answer:

Step-by-step explanation:
Given

Required
The sample mean
This is calculated using:

So, we have:


