Im having trouble on this

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

Give me the equations of two lines that have the same slope but are not parallel.

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20