Nova receives a bill for her cell phone each month. she pays a flat fee of $35 plus $0.05 per text message. this month, her bill without taxes was $51.50. which equation gives the number of text messages, t, she sent this month?

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.