Answer:
x = 2
Step-by-step explanation:
If ΔABC~ΔAED then:

If he travels 12km/h for 3 hours then he went 36km in 3hr. The answer is 36km.
You would need to isolate the "X" variable because it is common in all 3 equations.
Answer:
see below
Step-by-step explanation:
Because ∠ABE and ∠CBD are vertical angles, ∠ABE = ∠CBD = 40°.
Answer:
7(3 + 7)
Why:
7x3=21
7x7=49