Answer:11
Step-by-step explanation: think about 5+6 then when you add 11 to the -5 you get 6.
there is no acute angle.......
77.) x= {-5, 6}
78.) x= {-4, 9}
79.) x= {5/3, 2}
80.) x= {1/9, 3}
81.) x= {-6, 18}
82.) x= {-3√3 +4, 3√3 +4}
83.) x= {-7, -3}
84.) x= {-√85 +9 /2, √85 -9 /2}
Answer:
317
Step-by-step explanation:
I did this on khan academy
