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If a quadrilateral has exactly 2 lines of symmetry and both are angle bisectors then the figure must be a rhombus because it has exactly 2 pairs of congruent angles.
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Answer:
Step-by-step explanation:
let the speed of one plane=x mph
speed of other plane=x+120 mph
x×1.5+(x+120)×1.5=1620
(x+x+120)×1.5=1620
(2x+120)×1.5=1620
3x+180=1620
3x=1620-180
3x=1440
x=480
speed of one plane=480 mph
speed of second plane=480+120=600 mph
Answer:


Step-by-step explanation:
Given

Required
Choose equivalent expressions
Choosing the first answer:

Split expressions

Apply laws of indices: 

Apply laws of indices: 



Hence:

Choosing the second:

Apply law of indices: 
So,



Apply law of indices: 
So:

Answer:
Your answer would be 9.
Step-by-step explanation:
You always do parenthesis first, 9-6 is 3, then you would do division 3÷3 is 1 then you multiply 4×2 and that would be 8, finally you would at the 8 and the 1 and that would give you 9 as your answer. Hope this helps