If x ∈ W (whole numbers) and -4x > -2 - 3x, the solution set on the number line is :

The point P(m, n) is first reflected in x-axis to point P' and then point P' is reflected in y-axis to point P". Then the single transformation that reflects point P to P" is :

1. reflection in x-axis

2. reflection in y-axis

3. reflection in origin

4. invariant

△ABC and △PQR are similar to each other. If ∠A = 45° and ∠R = 55°; then angle B is equal to :

1. 55°

2. 80°

3. 100°

4. 90°