Asystem of equation can be solved by which of the following methods? select all that apply. a.matrix methodb. forward methodc. back substitution d. inverse method

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

Given sin∅ = 1/3 and 0 < ∅ < π/2 ; find tan2∅ a. (4√2)/9 b. 9/7 c. (4√2)/7 d.7/9