(6) 70, 70, 110
∠2 = ∠4 = 110° ( congruent angles )
∠3 = 180° - 110° = 70° ( straight angle )
∠1 = 70° ( vertically opposite ∠3 )
(9) ∠AEC = 15x - 11
since EC bisects ∠BED then ∠BEC = ∠CED = 4x + 1
∠AEC = ∠AEB + ∠BEC = 11x - 12 + 4x + 1 = 15x - 11
(7) x = 3
AC = AB + ABC = 32
2x + 6x + 8 = 32
8x + 8 = 32 ( subtract 8 from both sides )
8x = 24 ( divide both sides by 8 )
x = 3
The correct answer for the given question is B. Heat is written as a reactant in the equation.
<h3>What is endothermic reaction?</h3>
An endothermic reaction is a reaction in which is reactants absorbs heat from the surrounding to give the product or heat supplied is the reactant.
Suppose if A and B are reactants that forms product C and D,
and H be the heat absorbed or supplies to the reactants.
Then for an endothermic reaction we can write-
A + B + Heat ---> C + D
Since, Heat is absorbed at the reactant side then it is called as endothermic reaction.
Hence,the correct answer for the given question is B. Heat is written as a reactant in the equation.
More about endothermic reaction:
brainly.com/question/23184814
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