Answer:
B)140
Step-by-step explanation:
So a line is=180 and the interior angles of a triangle= 180, so I did some manipulations
1. 100 + (5x+5) + <ECD = 180. But we also know that (21x-7) + <ECD=180. With some manipulation we can find that <ECD= 180 - (21x-7), so we can plug that into the other equation
2. Now: 100 + (5x+5) + (180- (21x-7))= 180
3. Solve:
105+5x+180-21x+7=180
112-16x=0
112=16x
x=7
4. Plug x=7 into 21x-7= 140
Answer:
≈ 1.4 units
Step-by-step explanation:
Calculate the distance d using the distance formula
d =
with (x₁, y₁ ) = (3, 5) and (x₂, y₂ ) = (4, 6)
d =
=
=
= ≈ 1.4 ( to the nearest tenth )
Answer:
...
Step-by-step explanation: