Question

Can anyone please answer this and explain why it's the answer? (I'll attach the question's image in the comment)

Answer 1

1 is 5 and 5 is 10

Answer 2

5 is 9 **

Answer 3

The answers have 2 inequalities.

Answer 4

The whole problem set seems too much like "do my homework," but I will get you started.

All of the graphs involve combinations of
\(\begin{align} \text{The vertical line } \quad x&=1 \cr \text{The diagonal line } \quad y&=x+1 \cr \text{The circle }\quad x^2 + y^2 &= 1 \cr \text{The parabola} \quad y&=x^2 \cr \text{and the vertical line } \quad x&=-1 \end{align}\)

So let's look at the first one; There is the vertical line x=1. What is everything to the right of this? It is right, so it must be x > 1. Likewise, to the left is x < 1. All of the shaded area is to the left, so x<1 (circle 2) must be one of the conditions.

Now what else about the shaded area? All of the shaded area is above the diagonal line. The only diagonal lines in the answers is y=x+1. The shaded area is all to the left of this, so y<x+1 (circle 6) must be one of the conditions. And those are the two inequalities, circle 2 and circle 6.

Good luck!

Answer 5

It's not a homework, & I'm just studying for exam from the past papers (I already know the answers, but just don't know why it is the answers).

Thank you so much anyway for the explanation! I finally understand now :)