I would say -5.5., but I might be wrong.
Answer:
See explanation
Step-by-step explanation:
Given the inequality 
A) Add -3 to both sides of inequality:

Divide by -7 (remember, dividing the inequality by negative number changes the sign of inequality):

B) Plot open circle at -6 on the number line and shade all values of x which go to the left from -6 (see attached diagram).
Answer:
3.1 * 10^10
Step-by-step explanation:
Answer: 20 diagonales
Step-by-step explanation: