A scientist uses the expression 1.8c + 32 to find the temperature in degrees Fahrenheit for a given temperature in degrees Celsius c. Another scientist uses the expression, 3c - 28 to find the temperature in degrees Fahrenheit. A student in class says that when c=50 both expressions are equal. Part 1: Explain how you know the student is correct. Part 2: Will these expressions be equal for all values? Explain your reasoning.