A respeito dos produtos notáveis, assinale a alternativa que apresenta corretamente um deles: (x + a)² = x² + a²
(x + a).(x - a) = x² + xa + a²
(x – a)² = x² – a²
(x – a)² = x² – 2x – a²
(x – a)² = x² – 2xa + a²

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?