Needed asap 20 points if answered right

ANSWER

1. No real roots

2.

3. The discriminant is negative.

EXPLANATION

1. The given equation is

We have a=-2,b=-9 and c=-5.

The discriminant is given by:

This simplifies to:

Since the discriminant is less than zero, the quadratic equation has no real roots.

2. The given equation is:

We have a =-2, b=-7 and c=-2.

The roots of this equation are given by;

We plug in the values to get;

3. The given graph is hanging downwards. This means that it doesn't have x-intercepts.

Therefore the roots are complex or imaginary.

This implies that, the discriminant of the corresponding equation is negative.

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.

a and c

step-by-step explanation: