36-4.5x+36=102-7.5x-60
72-4.5x=42-7.5x
72+3.5x=42
3.5x=-30
x=8.57
Answer:
Step-by-step explanation:
Take 20( cosine of 75 degrees)
the answer is 5 ft
You need to expand the brackets eg.
(w-9)8 basically means 8 x (w-9) = 8w-72
Check whether it is possible to have a triangle with the given side lengths for example 7,9,13 then add any two sides and see if it is greater than the other side. Example the sum of 7 and 9 is 16 and 16 is greater than 13