Erin is buying produce at a store. she buys c cucumbers at $0.99 each and a apples at $0.79 each. what does the expression 0.99c+0.79a represent

If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0