0.5s+4a=15 as a graph?

What is the square root of 45? (step by step working plz)

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?

Reflect the point (7,0) across the y-axis