Which type of bias does the following situation refer to? "A high school student surveyed all the students in the cafeteria during her spare." A) Age
B) Self selection
C) convenience
D) economic
E) Cultural

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.

i dont know what you want me to answer for this but im guessing 2: 11?

x=3y-6

step-by-step explanation:

solve for   x by simplifying both sides of the equation, then isolating the variable.