Which number line model represents the expression-1/2+5/4
2 answers:
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This can be represented by the inequality 8 
x 12
As Dina wants at least 8, and no more than 12, that means 8, 9, 10,11, and 12, are applicable
As Dina wants at least 8, and no more than 12, that means 8, 9, 10,11, and 12, are applicable
Answer: 130.8 degrees
Explanation:
The problem can be solved by using the cosine theorem:
(1)
where
a,b,c are the lengths of the three sides of the triangle
is the angle between b and c
In this problem, we can identify a,b,c, with:
a = XZ = 11.05
b = XY = 6.32
c = YZ = 5.83
So, the angle corresponds to the angle m∠Y. Re-arranging eq.(1), we find
So, the angle is