Which expression is equivalent to 6 (a-3)?

A. 18a
B. 6(a) - 6(3)
C. 6(a) - 3
D. 3a

Ascuba diver was 80 feet below sea level and swam up at a rate of 4 feet per minute. the two solutions show how long it took the scuba diver to reach an elevation of 20 feet below sea level. lydia and max used the methods shown below to find the time it took the diver to reach the new elevation.

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes