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Svet_ta [14]
2 years ago
15

BEST Answer gets brainliest, ten points, a thanks AND a five star review:))

Mathematics
2 answers:
Viktor [21]2 years ago
7 0
C is the answer I hope
Basile [38]2 years ago
3 0

Answer:

hi i think it c

Step-by-step explanation:

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At a diving competition, Holly jumps from a springboard that is 3 meters above the surface of the water at time t=0 seconds. She
n200080 [17]

Answer:

Part A:  Vertex of function is at (0.5, 4.5)

h(t) = -6*(t - 0.5)^2  + 4.5

Part B:  We want the y-intercept to be (0, 3)  because  Holly starts at 3 meters above the water surface and at time t =0 seconds.

Solving for when she enters the water, we do not need to use t = 1.5 seconds, because it is unclear if h< 0 at that time.

h(t ) =0  =  -6*(t - 0.5)^2 + 4.5

-4.5 = -6*(t - 0.5)^2

4.5/6 = (t - 0.5)^2

0.866025  = t - 0.5

t = 0.5 + 0.866025 =  1.366025  seconds

So at 1.366 seconds, Holly is at the surface of the water.

Step-by-step explanation:

We know that for a quadratic function that models a trajectory path, that the vertex is the maximum point.

With a maximum at h = 4.5 meters at time t = 0.5 seconds

Vertex = (0.5, 4.5)

x-intercept at   (1.5, 0)

Parabolic equation:   h(t) = a *(t - h)^2  + k

h(t) = a*(t - 0.5)^2 + 4.5

--------------------

We need  h(t) = 3  at t = 0

3 =  a*(0 - 0.5)^2  + 4.5

-1.5 = a * (-0.5)^2

-1.5 = a*0.25

a = -1.5/0.25

a = -6

so:   h(t) = -6*(t - 0.5)^2  + 4.5

----------------------

With  t = 1.5 at  h < 0

0 = a*(1.5 - 0.5)^2  + 4.5

0 = a*1 + 4.5

a = -4.5 ?   this part we really do not know if t = 1.5 seconds is when h = 0

it says she enters the water, it could mean h(t) < 0 here.

7 0
3 years ago
Which represents the value of point D on the number line?
nataly862011 [7]

Answer:

The answer would be D, -(-4)

Step-by-step explanation:

This is because two negatives equal a positive.

8 0
2 years ago
The function g(x)=8(4x) is reflected across the x-axis to create f(x) What is the equation of f(x)?
Law Incorporation [45]

Answer:

g(x)=-32x

Step-by-step explanation:

When something is reflected over the x-axis. The x doesn't change, it's the y that changes. So let's just generally say you have the point (x, y). Reflecting this over the x-axis means the y is changing, so it becomes (x, -y). And since the g(x) represents the y, you multiply the entire thing by -1. So the new equation becomes: g(x) = -(8(4x)) = -8(4x) = -32x. So the equation is g(x) = -32x or -8(4x) if you want to leave it like how it was before.

7 0
2 years ago
wich is the biggest number in the world from 1.2.3.4.5.6.7.8.9 wich one of these numbers you think is bigger be careful ?​
Alex_Xolod [135]

Answer: nine and if its a joke i have no clue

8 0
3 years ago
Solve for the value of x ? −2(x+13)+9x=4
Reika [66]

Answer:

30/7

Step-by-step explanation:

Distribute:

-2x-26+9x=4

Combine like terms:

7x-26=4

Add 26.

7x=30

Divide by 7:

x=30/7.

Hope this helps :D

7 0
3 years ago
Read 2 more answers
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