Expand 2/5(−5c+10) .

To expand 2/5(−5c+10), we need to distribute the fraction 2/5 to each term inside the parentheses.

First, distribute 2/5 to -5c:
(2/5)(-5c) = (-10c)/5 = -2c

Then, distribute 2/5 to 10:
(2/5)(10) = 20/5 = 4

Therefore, 2/5(−5c+10) expands to:
-2c + 4