4a + 6b= 10 2a - 4b =12 what does 12a=

20 points! asap! a is known to be 6,500 feet above sea level; ab = 600 feet. the angle at a looking up at p is 20°. the angle at b looking up at p is 35°. how far above sea level is the peak p? find the height of the mountain peak to the nearest foot. height above sea level =

What are the domain and range of the function f(x)=2^x+1

Having a hard time understanding this question (see attachment).