Write an expression to model the following situation: A submarine was 32 m below sea level. It descended 28 more meters. What is its new position below sea level?

32 + 28

32 – 28

–32 + 28

–32 – 28

Which of the following is true for the relation f(x)=2x^2+1

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?