Question 8 (1 point) What is the value of the expression 5(a + b)-3(b + c) if a = 4, b 3, and c 2? A. 20 B. 18 C. 14 D. 10 A B O
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Answer:
Angle Sum Property of triangle states that the sum of all the angles of a triangle is equal to 180°
Therefore ,
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For this case we must solve the following equation:
We remove the parentheses on the right side:
We add similar terms on the right side:
We subtract from both sides of the equation:
We add 9 to both sides of the equation:
We divide by 8 on both sides of the equation:
We apply square root to both sides of the equation:
We have two roots:
Answer: