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german
3 years ago
11

a dragonfly can beat its wings 30 times per second. write an equation in slope-intercept form that shows the relationship betwee

n flying time in seconds and the number of times that dragonfly beats its wings
Mathematics
1 answer:
Advocard [28]3 years ago
3 0
Based off of my understanding, it doesn’t have a y intercept, so it should just be
y = 30x.
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Hello,
Nookie1986 [14]

Answer:

s = height above ground

s = 60 + 20 t - 4.9 t^2 (standard physics equation on earth)

at t = 0

s = 60 (clearly :)

now when does it hit the bleak earth?

That is when s = 0

4.9 t^2 - 20 t -60 = 0

solve quadratic and use the positive t (the negative t was back before you threw it if you had thrown it from the ground)

t = 6.09 or - 2.01

use t = 6.09

now to do the last part there are two obvious ways to get t at the peak

1. look for vertex of parabola

2. look for halfway between t = -2.01 and t = 6.09

I will do it the hard (11) waay by completing the square

4.9 t^2 - 20 t = -(s-60)

t^2 - 4.08 t = -.204 s + 12.2

t^2 - 4.08 t +2.04^2 = -.204 s +12.2 + 4.16

(t-2.04)^2 = -.204(s-80.2)

so

top at 80.2 meters at t = 2.04 s

===============

quick check on time

should be average of 6.09 and -2.01

=4.08 /2 = 2.04 check

7 0
2 years ago
Read 2 more answers
I NEED help with this ASAP
boyakko [2]

Answer:

This triangle is a scalene triangle.

Step-by-step explanation:

A scalene triangle means that all of the sides are different.

Hope this helps!

3 0
3 years ago
5P
BigorU [14]
Yup here you go it’s uhmmmm idk anymore heheh
6 0
2 years ago
NEED HELP ASAP ! answers !
bazaltina [42]

Answer:

92 degrees

Step-by-step explanation:

7 0
3 years ago
Carol has 88 cm of string and cuts it in the ratio 5 : 6. What is the total parts?​
Mrrafil [7]

Answer:

5+6= 11

88/11= 8

5x8= <u>40</u>

6x8= <u>48</u>

6 0
3 years ago
Read 2 more answers
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