What is the value of the expression x + (–y) when x = –3.8 and y = 1.7?

A–5.5

B–2.1

C2.1

D5.5

A deep sea diver’s depth is currently 30 m below the surface of the water.

Which expressions represent a change in depth of d meters?

Choose exactly two answers that are correct.

AB.

CD.

...