Which of the following is a biconditional statement?
A) A shape has four sides if and only if it's a quadrilateral.
B) If a shape is a quadrilateral, then it has four sides.
C) If a shape doesn't have four sides, then it isn't a quadrilateral.
D) if a shape has four sides, then it's a quadrilateral.

Will give brainliest plz hurry lexie surveyed 4 teenagers to find out approximately how many hours, per week, they read for fun, and how many siblings they have. brooke said she reads about 10 h a week for fun, and that she has 5 siblings. celia said she has 1 brother and 1 sister and reads for fun about 3 h each week. henry said he has 2 brothers and reads for fun about 30 min each week. jude said he doesn't read for fun and has 3 brothers and 3 sisters. use this information to complete the data table. express your answers as whole numbers or decimals. name hours of fun number of siblings brooke celia __ henry jude

Abcd is a square. what is the measure of angle bac

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.