Alguien me ayuda con este problema plis? Es asi: la figura esta formada por 4 rectangulos iguales a R. El lado mayor de R mide 20cm ¿cual es el perimetro de la figura?

Timed*** there are 8 rows and 8 columns, or 64 squares on a chessboard. suppose you place 1 penny on row 1 column a, 2 pennies on row 1 column b, 4 pennies on row 1 column c, and so on … how many pennies are on each square? a =   b =   c = d =   e =   f = g =   h =

Solve the equation by completing the square. x^2+2x=17

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.