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Nat2105 [25]
4 years ago
7

How many times does a dragonfly's wing beat per minute

Mathematics
1 answer:
marshall27 [118]4 years ago
5 0
<span>A dragonfly beats its wings about 30 times a second. This is necessary to allow the insect to keep itself airborne, due to the relative weight of its body. Luckily, dragonflies have two sets of wings, or they would have to work even harder to stay up in the air.</span>
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A+4b=-4 a+10b=-16<br>how to solve this problem ​
UNO [17]

Answer:

a,b=4,-2

Step-by-step explanation:

Subtract:

a-a+4b-10b=-4-(-16)

-6b=-4+16

-6b=12

b=-2.

Plug in:

a+4(-2)=-4

a-8=-4

a=4.

Hope this helps plz hit the crown :D

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3 years ago
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Answer:

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4 years ago
If an object is dropped from a height of 144 ft, the function h(t) = –16t² + 144 gives the height of the object after t seconds.
Oksi-84 [34.3K]
H(t) = -16t² + 144

When will the object hit the ground? This means that the height will equal to 0.

h(t) = 0
0 = -16t² + 144
16t² = 144
t² = 144/16
t² = 9
√t² = √9
t = 3

The object will hit the ground after 3 seconds.
8 0
3 years ago
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Answer:

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