Assessment 2: My Values Solve for the values of the variables then check your answers. Show y complete solution and box your final answer. Write your solution ar answers on your answer sheet. Number 1 is answered for you. 1. - 3x + 8 = 18 - 5x 4. 3x + 5 = 5x + 17 = - 3x + 5x = 18 - 8 2x = 10 2x 10 -- Check: -3(5) + 8 = 18 - 5(5) -15 + 8 = 18 - 25 -7= -7 True - 2 2 x = 5 2. 18 + 2x = 0 --- 5. y UN . y = -2 3. 1 - m = -6 6. - 11x = 121
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Answers & Comments
Answer:
✒️ANGLES
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\large\underline{\mathbb{ANSWER}:}
ANSWER:
\qquad \Large \:\: \rm 1) \; m\angle ABD = 54\degree1)m∠ABD=54°
\qquad \Large \:\: \rm 2) \; m\angle CBD = 36\degree2)m∠CBD=36°
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\large\underline{\mathbb{SOLUTION}:}
SOLUTION:
Since angle ABC is a right angle (90°), then angles ABD and CBD are complementary.
m\angle ABD + m\angle CBD = 90\degreem∠ABD+m∠CBD=90°
Substitute the given to find x that can be substituted to each angle measures and to find its actual measurement.
(2x - 10)\degree + (x + 4)\degree = 90\degree(2x−10)°+(x+4)°=90°
2x - 10 + x + 4 = 902x−10+x+4=90
3x - 6 = 903x−6=90
3x = 90 + 63x=90+6
3x = 963x=96
\begin{gathered} \frac{3x}3 = \frac{96}3 \\ \end{gathered}
3
3x
=
3
96
x = 32x=32
Thus, the value of x is 32. Find the measurements of angles ABD and CBD.
Number 1:
m\angle ABD = (2x - 10)\degreem∠ABD=(2x−10)°
m\angle ABD = (2(32) - 10)\degreem∠ABD=(2(32)−10)°
m\angle ABD = (64 - 10)\degreem∠ABD=(64−10)°
m\angle ABD = 54\degreem∠ABD=54°
Number 2:
m\angle CBD = (x + 4)\degreem∠CBD=(x+4)°
m\angle CBD = (32 + 4)\degreem∠CBD=(32+4)°
m\angle CBD = 36\degreem∠CBD=36°
Therefore, the measure of angle ABD is 54° and the measure of angle CBD is 36°
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