The answer is 4.191786247582 see attached
The artistic crop isn't helpful; it cuts off some vertex names.
The circumcenter H is the meet of the perpendicular bisectors of the sides, helpfully drawn. We have right triangle ELH, right angle L, so
EH² = HL² + EL²
EL = √(EH² - HL²) = √(5.06²-2.74²) ≈ 4.2539393507665339
Since HL is a perpendicular bisector of EF, we get congruent segments FL=EL.
Answer: 4.25
What a coincidence that I just did this in my math class today. A function is a relation in which no 2 different ordered pairs have the same first coordinate. They are allowed to have the same second coordinate. So the third option is correct.
the property of a rectangle two opposite sides are the same. meaning the length that is X must have the same length on the other side right. Same thing as the side 2 4/5. so there are 2 of that same number. you're basically multiplying it by 2
expression
2x + 2(2 4/5) = P
if you don't understand that it's basically like this
x + x + 2 4/5 + 2 4/5 = P (it's the same as the above expression)
P = perimeter of rectangle
-8 is the nth term of this sequence