Subtract: (- 20.8x² + 3.7x + 2.9) – (- 15.7x² – 5.2x + 1.6)

Which of the following statement about pascal's triangle are true?

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?

Consider circle c with angle acb measuring 3/4 radians.if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.