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RoseWind [281]
3 years ago
6

How much is 70% from 20

Mathematics
1 answer:
charle [14.2K]3 years ago
7 0

Answer:14

Step-by-step explanation:

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an ornithologist studying the flight of birds measured the efficiency for parakeets flying at various speed in a descending flig
borishaifa [10]

Step-by-step explanation:

Given:

  1. when s = 12 mph     t =0.18  let   (s,t) or (a,b) = (12,0.18)
  2. when s = 22 mph    t = 0.23 s     (s,t) or (a,b) =(22,0.23)
  3. when s = 30 mph     t = 0.15 s     (s,t) or (a,b) =(30,0.15)

<u>we know the general format of Quadratic equation to be </u>

<u>= </u><u>ax²+bx+c=0</u>

<u></u>

<u>Step 1</u> :

when the birds pass through a,b (12,0.18) we cane give the expression as

= ax²+bx+c=0

= 12x² + 0.18x + c= 0

it can also be written as

<u>s = ut + 1/2 at²</u>  = 0.18t +( 1/2) a(0.18)²

<u></u>

<u>step 2 :</u>

through points (22,0.23)

= 22x² + 0.23x + c = 0

<u>s = ut + 1/2 at²</u>  = 0.23t + (1/2) a(0.23)²

<u>Step 3 :</u>

through points (30,0.15)

= 30x² + 0.15x + c = 0

<u>s = ut + 1/2 at²</u>    

= 0.15 u +(1/2)  a(0.15)²

7 0
3 years ago
Solve for s<br> 2s+4=5(-4-2s)
Kruka [31]

Answer:

s=-2

Step-by-step explanation:

Explanation in picture

5 0
4 years ago
Read 2 more answers
A rectangular prism has a volume of 96 ft3.the. Area of the base is 24 ft2.what is the height of the prism?
iren [92.7K]
H= 4 because volume of a prism is V=Bh and V=96 and B = 24 so it would be left as 96=24h So in order to find h we have to divide 24 by each number to find h alone so 24 divided by 24 equals 0 and 96 divided by 24 equals 4 so your answer is 4. Also, if you put the equation together after you find 4 you will see it all adds up. 96=24(4) which is correct
3 0
3 years ago
Fred wants to but two teeshirt. The first shop sells them for £11.45 each and it is buy one get one half price. The second shop
xz_007 [3.2K]

Answer:

thwe next time i want iti wnat ti

Step-by-step explanation:

5 0
3 years ago
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Graph the following: x-y=-2
Reil [10]
Could be x=4 y=6 but it could be anything. Unless you’re asking something else idk
8 0
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