need help again asap

Answer:
[tex]50^{\circ}[/tex]
Step-by-step explanation:
Complementary angles mean that the sum of the angles add up to [tex]90^{\circ}[/tex]. We can use algebra to solve for [tex]x[/tex] and then to determine [tex]m\angle QRS[/tex].
[tex]m\angle QRS + m\angle SRT = 90[/tex]
[tex]8x+10 + 8x = 90[/tex]
[tex]16x = 80[/tex]
[tex]x = 5[/tex]
[tex]m\angle QRS = 8x+10[/tex]
[tex]= 8(5)+10[/tex] (substitution)
[tex]=50^{\circ}[/tex]
∴ [tex]m\angle QRS = 50^{\circ}[/tex]
Hope this helps :)