1.1x -1.8 should be the answer.
Answer:
You just need to demonstrate that the expression is not equivalent. To do that, we just need to evaluate the expression with a specific number.
For 
, we have
Notice that the answer is true because 2 is not equivalent to 5.
Therefore, the expression is actually non-equivalent.
I´d say "d" is the distance from the eye to the wall.
Now substracting 1.2-1 you´ll get the distance of the wall of the smallest triangle = 0.2 And you do 1.5-0.2= 0.3 that´s the distance of the wall of the other triangle. Then you solve everything with Pitagoras theorem. You have 2 rectangle triangles.
B+alfa=45°
tan^-1(0.2/d)=B
tan^-1(1.3/d)=alfa
THEN:
tan^-1(0.2/d)+tan^-1(1.3/d)=45°
Now you have 3 ecs and 3 variables.
alfa,B and "d"
-77 and 7/20 is the answer simplified and without it being simplified you get -77 and 35/100
558.7 , because 74 x 7.55 = 588.7 , it would be his total for the two weeks
