Evaluate the expression 25 - k + v for k=20 and v=10

)a smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288

Perform the indicated operation and write the answer in the form a + bi. (-5 + 2) + (3 - 6i)