A rock climber starts at an elevation 630 feet above sea level and descends to a point 180 feet lower than his starting point. What is the rock climber's elevation?

A. 450 feet
B. 810 feet
C. -810 feet
D. -450 feet

A. 450 feet

Step-by-step explanation:

If the rock climber starts at 630 feet above sea level,  decending down 180 feet lower than his starting point (630) would put him at 450 feet above sea level.  Hope this helps

4th option is correct xy=-10

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answer:   rotate 270° clockwise about (7, 1) and reflect across the line x = 7

step-by-step explanation:

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