Answer:
60
Step-by-step explanation:
Google "Area of a trapezoid formula" and that will help you with this
Answer:
0.0066%
Step-by-step explanation:
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Answer:
Step-by-step explanation:

multiply by
on each side

add 1 on both sides 
make it equal 0

Factor

answer is 3 and -1
Answer:
19.34cm
Step-by-step explanation:
Rigth Angled triangle
use SOHCAHTOA
Cos°=adj/hyp
Cos 71=6.3/BC
BC=6.3/COS 71
COS 71°= 0.3256
BC=6.3/0.3256
BC= 19.34cm