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Cerrena [4.2K]
3 years ago
13

What are the coordinates of the midpoint of a segment AB , if: A(–3, 4), B( 1, 2)

Mathematics
1 answer:
Alik [6]3 years ago
3 0

Hi there! :)

Answer:

\huge\boxed{(-1, 3)}

Use the midpoint formula to derive the midpoint of the segment:

(x_{m} ,y_{m}) = (\frac{x_{1}+x_{2}  }{2} , \frac{y_{1}+y_{2}  }{2}   )

Substitute in the coordinates:

(x_{m} ,y_{m}) = (\frac{-3+1  }{2} , \frac{4+2  }{2}   )

Simplify:

(x_{m} ,y_{m}) = (-1 , 3   )

The coordinates of the midpoint are:

(-1, 3)

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A toy rocket is launched vertically from 5 feet above ground level with an initial velocity of 112 feet per second. The height h
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Answer:

Step-by-step explanation:

a)The height h after t seconds is given by the equation h(t)=-16t^2+112t+5.

Where 5 represents 5feet above the ground and this is the height from which the rocket was launched.

The equation is a quadratic equation. The plot of this equation on a graph would give a parabola whose vertex would be equal to the maximum height travelled by the rocket.

The vertex of the parabola is calculated as follows,

Vertex = -b/2a

From the equation,

a = -16

b = 112

Vertex = - - 112/32= 3.5

So the rocket will attain maximum height at 3.5 seconds.

It will also take 3.5 seconds to reach the ground. This means it will take a total of 3.5 seconds + 3.5 seconds

= 7 seconds to hit the ground.

b) to find time it will take to be 100 feet above the ground,

-16t^2+112t-95 = 0

Using general quadratic equation formula,

a = -16

b = 112

c = -95

t = [-b+/-√b^2-4ac]/2a

t = [ -112 +/-√112^2-4×-16×-95]/16 × -2

= [-112 +/-√12544-6080]/-32

= (-112+80.4)/-32 or (-112-80.4)/-32

t = 0.9875 or t = 6.0125

So it will take 0.9875 or approximately 1 second to be 100 feet above the ground

7 0
3 years ago
What is the domain and range​
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Answer:

The domain is all the x-values, and the range is all the y-values

Step-by-step explanation:

7 0
3 years ago
The students in Jeremiah's grade voted to select a guest speaker. 45 students voted for a famous athlete. If there are 90 studen
Ghella [55]

Answer:

50%

Step-by-step explanation:

45 is half of 90. A percent is out of 100. So when you split 100 in half, it equals 50. The answer is 50%. Glad I could help!

3 0
2 years ago
Read 2 more answers
Please give me the correct answer. No mistakes. Thanks.
IceJOKER [234]

Answer:

Hello there, I think the answer you are looking for is 16.6

Step-by-step explanation:

I'm Katie, I hope this helps you. :] , have a great day.

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3 years ago
Solve the inequality below. Use the drop-down menus to describe the solution and its greah
Solnce55 [7]

Answer:

The solution of the inequality is x ≤ -4. A graph of the solution should have a vertical line passing through x = -4 and be shaded to the left of x = -4

Step-by-step explanation:

-7x + 13 ≥ 41

Subtract 13 from both sides

-7x ≥ 28

Dividing both sides by the -7 changes the inequality sign and we have

x ≤ -4

Hence, the solution of the inequality is x ≤ -4 and the graph of the solution should have a vertical line passing through x = -4 and it should be shaded to the left of x = -4 indicating that only numbers less than or equal to -4 are possible solutions of the inequality.

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