1
adeep-sea diver must descend and ascend in short steps to equalize pressure on her body. if the diver rises
toward the surface too quickly, she may suffer from a physical condition called "the bends." suppose the
diver descends to the bottom in three steps of 12 feet each. write and simplify an expression to describe the
diver's change in elevation.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.