The mexican tetra is a tropical fish that requires a water temperature between 68 and 77 degrees fahrenheit, inclusive. an aquarium is heated 8 degrees so that a tetra can live in it. what temperatures could the water have been before the heating?

The temperature of the water could have been between 60 and 69 degrees Fahrenheit(inclusive) before the heating.

Explanation

Suppose, the temperature of the water before the heating was degree Fahrenheit.

The aquarium is heated 8 degrees so that a Tetra can live in it. So, the current temperature of the water degree Fahrenheit.

Given that, Tetra requires a water temperature between 68 and 77 degrees Fahrenheit, inclusive. So.....

Thus, the temperature of the water could have been between 60 and 69 degrees Fahrenheit(inclusive) before the heating.

i believe the answer is the polygon, heptagon.

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)