3 years ago

I need help solving this 8

Mathematics

2 answers:

ch4aika [34]3 years ago

7 0

8 < x+3 = 8-3 < x =5X+3< 12 = x<12-3 = x<9

vlabodo [156]3 years ago

6 0

Answer:

whats the question?

Step-by-step explanation:

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3 years ago

if BD is perpendicular to AC M angle DBE equals 2x - 1 + m angle CBE equals 5x - 42 find the value of x

Paha777 [63]

<h2>Answer:</h2>

<h2>Step-by-step explanation:</h2>

I've drawn a graph in order to a better understanding of this problem. We know that:

BC is perpendicular to AC

∠DBE = 2x - 1

∠CBE = 5x - 42

Let's call the intersection of line BC and AC the point P, so:

∠P=90°

And points B, P and C form the triangle ΔBPC. On the other hand, ∠CBE and ∠PCB are Alternate Interior Angles, so:

∠PCB = ∠CBE = 5x - 42

Moreover:

∠PBC = 2x - 1 - (5x - 42)

∠PBC = 2x - 1 - 5x + 42

∠PBC = -3x + 41

The internal angles of any triangle add up to 180°. Hence for ΔBPC:

90° + ∠PBC + ∠PCB = 180°

90° - 3x + 41 + 5x - 42 = 180°

2x + 89 = 180

2x = 91

x = 45.5°

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3 years ago