Iam not understanding any of this math stuff. how would you solve and graph systems of inequalities? for example, x+y< _-1 x+y> _3

x + y ≥ 3

Step-by-step explanation:

(1)  x + y ≥ -1

(2) x + y ≥  3

Step 1. Graph the equalities

(3) x + y = -1

(4) x + y =  3

For Equation (3)

x   -5   0    5

y    4  -1    -6

For Equation (4)

x  -5   0   5

y   8   3  -2

We get the graphs in Fig.1.

Step 2. Check one or two points to find those in the solution set.

Check the point (10,0).

For Equation (1),  

10 + 0 ≥ -1. TRUE. (10,0) is in the solution set.

Shade the region to the right of the red solid line and including the line, red (Fig. 2).

For Equation (2),

10 + 0 ≥ 3. TRUE. (10,0) is in the solution set.

Shade the region to the right of the blue solid line and including the line, blue (Fig. 3).

Step 3. Identify the solution set for the system of inequalities.

Fig. 4 shows that the solution set is the purple region of the plane in which the two sets overlap.

Every point that satisfies Inequality (2) also satisfies Inequality (1).

The solution set is x + y ≥ 3.

17 1/3

step-by-step explanation:

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.