Determine whether the following number sentences are TRUE or FALSE. Justify your answer.
Part A: 7+5+3+x=1+3+ 12
Part b: 1/2-5/8-7/9-=7/9-5/8-/1/2
2
Port , 67 +5+18 +52
Port D: (2+2) = 22"

a

step-by-step explanation:

try quizlet : ) hope this

if i did my math right then the answer should but 108

  b:   ∠x = 28.6°, ∠y = 31.2°, ∠z = 120.2°

step-by-step explanation:

this is one of those questions where "test taking skill" is all you need. the only answer that has angles that sum to 180° is the one shown above. the remaining choices do not describe the angles of a triangle.

if you want to do more work than simply adding the offered numbers, you can also check them against the law of sines. it should be true that

  x/sin(x) = y/sin(y) = z/sin(z)

and all of these ratios must be greater than 15, the longest side length.

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if you want to solve the triangle from scratch, i'd suggest solving for the largest angle using the law of cosines.

  z² = x² +y² -2xy·cos(z)

  z = arccos((x² +y² -z²)/(2xy)) = arccos(-75.11/149.4) = 120.182°

now you can find y from the law of sines

  y = arcsin(y/z·sin(z)) = 31.242°