2 answers:
Answer:
120
Step-by-step explanation:
ABC is a straight line so it is equal to 180
ABC = ABD + DBC
180 = 2x + x+90
Combine like terms
180 = 3x+90
Subtract 90 from each side
180-90 = 3x+90-90
90 = 3x
Divide each side by 3
90/3 = 3x/3
30 =x
We want to find DBC
DBC = x+90
= 30+90
= 120
Answer:
m<DBC=120°
Step-by-step explanation:
2x+x+90=180
3x=180-90
3x=90
x=30
m<DBC=x+90=30+90=120
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Step-by-step explanation:
Answer:
x > 3
Step-by-step explanation:
3x-9-5x > -3x - 6
3x-5x+3x > -6+9
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Answer:
Step-by-step explanation:
slope m= (y2-y1) / (x2-x1) = 15-12 / 4-4 = 3/0 is undefined since we can not divide by 0
slope is undefined so the line is vertical
