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3 years ago

Help me pls... thxxx...

Mathematics

1 answer:

Vesnalui [34]3 years ago

3 0

Hello :D

12 + 9 = 21

21 + 12 = 33

π x 9 = 9π/2= 4.5π

33 + 4.5π = 47.13

Answer = 47.13

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The quadratic model f(x)=-5x^2 +200 represents the approximate height, in meters, of a ball x seconds after being dropped. The b

mel-nik [20]

Answer:

Third option: 5.48

Step-by-step explanation:

Given the quadratic model that represents the approximate height in meters of the ball $f(x)=-5x^2 +200$ . the time in seconds x, when the ball is 50 meters from the ground can be calculated by substituting $f(x)=50$ and solving for x.

Then:

$50=-5x^2 +200$

Subtract 200 from both sides:

$-200+50=-5x^2 +200-200\\-150=-5x^2$

Divide both sides by -5:

$\frac{-150}{-5}=\frac{-5x^2}{-5}\\30=x^2$

Apply square root to both sides:

$\sqrt{30}=\sqrt{x^2}\\\sqrt{30}=x\\5.48=x$

The ball is 50 meters from the ground after about 5.48 seconds.

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4 years ago

2+2 equals .................................................

Sholpan [36]

2+2=4

Are you sure you need help with this

4 0

3 years ago

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Thepotemich [5.8K]

Answer:

1/3 = 2/6

2/6 + 2/6 = 4/6 = 2/3

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Step-by-step explanation:

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3 years ago

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Eloise practiced piano for 25 of an hour. Sarah practiced piano for 34 of an hour.

MrMuchimi

Answer:

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Step-by-step explanation:

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3 years ago

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zepelin [54]

Answer:

x=6561

Step-by-step explanation:

We can solve this equation for x to get

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3 years ago