Question

-4f - 9 f + 15

I'm trying to find out this question so my grade can go up from a f to something like a c or b please help me​

Answer 1

13f+15

Explanation:

- plus - equals addition so you add 4 and 9 then the two - will equal to a + so there will be no sign there 15 cant be added to 13F because it doesnt have the same letter (f) (i said it in the simplest way possible hope u get a c or b ^^)