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ludmilkaskok [199]
3 years ago
6

50 points help please

Mathematics
2 answers:
weeeeeb [17]3 years ago
8 0
<h3>Answer:</h3>

<em>It would be y=75.</em>

<h3>Step-by-step explanation:</h3>

As if you line up with 20 on the x axis, the scatter of dots passes through at around a range of 60-80. So a reasonable answer would be somewhere within that range. With that, the only available choice within this range is Choice C, or y=75.

yan [13]3 years ago
3 0

Answer:

C

Step-by-step explanation:

The line of best fit need to start from about 80~ to the end which pass right above the second dot for x=20, so the answer is C.

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Step-by-step explanation:

65 - 2 × 7 + 9 ÷ 3

65 - 14 + 3

51 + 3 = 54

Option A is the correct answer

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3 years ago
A ball is thrown in the air from a height of 3 m with an initial velocity of 12 m/s. To the nearest tenth of a second, how long
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Answer:  1.4 seconds

<u>Step-by-step explanation:</u>

The equation is: h(t) = at² + v₀t + h₀          where

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  • v₀ is the initial velocity
  • h₀ is the initial height

Given:  

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  • v₀ = 12
  • h₀ = 3

Since we are trying to find out when it lands on the ground, h(t) = 0

EQUATION:   0 = 9.81t² + 12t + 3

Use the quadratic equation to find the x-intercepts

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x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\\\\\\x=\dfrac{-(12)\pm \sqrt{(12)^2-4(-9.81)(3)}}{2(-9.81)}\\\\\\x=\dfrac{-12\pm 16.2}{-19.62}\\\\\\x=\dfrac{-12+ 16.2}{-19.62}=-0.2\qquad x=\dfrac{-12- 16.2}{-19.62}=\large\boxed{1.4}\\

Note: Negative time (-0.2) is not valid

4 0
3 years ago
What is the area of the following circle?
zhannawk [14.2K]

Answer:

38.47 m2

Step-by-step explanation:

Area = 3.5 x 3.5 x 3.14

Area = 12.25 x 3.14

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3 0
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The given equation is:

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The correct answer would be option A.

The equations in option A are:

x(t) = 5t \\ &#10;y(t)= \sqrt{5t+3}

From first equation we can see that 5t is equal to x. Using the value of 5th in second equation, we get the equation as:

y= \sqrt{x+3}

Therefore, the correct answer is option A
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C because if you divide the angle minus the feet you get 120

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