The sum of -9 and a number A) -9-x
B)-9/x
C) 9 + x
D) -9x

Sum: Something + Something

sum of -9 and a number=

-9 + x

answer

C)

50*10 is greater

step-by-step explanation:

if you add the zero from 10 to 50, it will give you a bigger number.