Given: q = 7m + 3n, r = 11 - 2m, s = n + 5, and t = -m - 3n + 8. simplify [q - r] + [s - t].

Step-by-step explanation:

Given : ,

,

, and

Now  ,

   [ ∵ (-)(+)=(-) and (-)(-)=(+)]

[Note : when -1 is outside the parenthesis it indicates that -1 should be multiplied with each of the terms present inside the parenthesis .]

 [Combine like terms.]

   [ ∵ (-)(+)=(-) and (-)(-)=(+)]

   [Combine like terms.]

Now,

 [combine like terms]

Hence,

h who knows

step-by-step explanation:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: