-5x - 7 < 28.....add 7 to both sides
-5x < 35....divide both sides by -5, change the inequality sign (u change the inequality sign when dividing/multiplying by a negative number)
x > -7
It would take about 63 hours...
Answer:
Step-by-step explanation:

In a right rectangle, we have:


For your exercice, hypotenuse=12
The exercise also inform the angle 60°, then:
