Respuesta :

a= -15.4 and b= -13.5
a + b = -15.4 +  -13.5 = -28.9

[tex]\huge\text{Hey there!}[/tex]

[tex]\large\boxed{\mathsf{a + b}}\\\large\boxed{\mathsf{= -15.4 + -13.5}}\\\large\boxed{\mathsf{= -15.4 + (-13.5)}}\\\large\boxed{\mathsf{= -15.4 - 13.5}}\\\large\boxed{\mathsf{= -28.90}}\\\large\boxed{\mathsf{= -28.9}}\\\\\large\boxed{\mathsf{Therefore, your\ answer\ is: -28.9}}\large\checkmark[/tex]

[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]

~[tex]\large\boxed{\frak{Amphitrite1040:)}}[/tex]