Question

write true or false
a.the sum of two negative integers is always a negative integer.
b.the sum of a positive and negative integer is always a negative integer .
c.the successor of -15 is -16 .

Answer 1

$$\begin{gathered} \left(1\right) \\ \mathrm{The}\mathrm{sum}\mathrm{of}\mathrm{twoo}\mathrm{negative}\mathrm{integer}\mathrm{is}\mathrm{always}\mathrm{a}\mathrm{negative}\mathrm{integer}-\mathbf{True} \\ \left(2\right) \\ \mathrm{The}\mathrm{sum}\mathrm{of}\mathrm{a}\mathrm{positive}\mathrm{and}\mathrm{negaive}\mathrm{integer}\mathrm{is}\mathrm{always}\mathrm{a}\mathrm{negative}\mathrm{integer}-\mathbf{}\mathbf{False} \\ \mathrm{Reason}:\left(+3\right)+\left(-2\right)=3-2=1 \\ \left(3\right) \\ \mathrm{The}\mathrm{successor}\mathrm{of}-15\mathrm{is}-16:\mathbf{False} \\ \mathrm{Reason}:-15+1=-14 \end{gathered}$$