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3 years ago

Please help it’s the last question I have left until I can turn this in please answer ASAP if possible

Mathematics

1 answer:

telo118 [61]3 years ago

5 0

Answer:

i cant see

Step-by-step explanation:

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If each exterior angle of a regular polygon is 30°, find how many sides the polygon has & the measure of an

WITCHER [35]

Answer:

12 sides and measure of each interior angle is 150...

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3 years ago

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100 points

Rom4ik [11]

Hello,

Your answer would be:

2=2

Your explanation/work would be:

7(2) - 12 = 8(2) - 14
14 - 12 = 16 - 14
2 = 2

Plz mark me brainliest

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3 years ago

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The graph h = −16t^2 + 25t + 5 models the height and time of a ball that was thrown off of a building where h is the height in f

Thepotemich [5.8K]

Answer:

part 1) 0.78 seconds

part 2) 1.74 seconds

Step-by-step explanation:

step 1

At about what time did the ball reach the maximum?

Let

h ----> the height of a ball in feet

t ---> the time in seconds

we have

$h(t)=-16t^{2}+25t+5$

This is a vertical parabola open downward (the leading coefficient is negative)

The vertex represent a maximum

The x-coordinate of the vertex represent the time when the ball reach the maximum

Find the vertex

Convert the equation in vertex form

Factor -16

$h(t)=-16(t^{2}-\frac{25}{16}t)+5$

Complete the square

$h(t)=-16(t^{2}-\frac{25}{16}t+\frac{625}{1,024})+5+\frac{625}{64}$

$h(t)=-16(t^{2}-\frac{25}{16}t+\frac{625}{1,024})+\frac{945}{64}\\h(t)=-16(t^{2}-\frac{25}{16}t+\frac{625}{1,024})+\frac{945}{64}$

Rewrite as perfect squares

$h(t)=-16(t-\frac{25}{32})^{2}+\frac{945}{64}$

The vertex is the point $(\frac{25}{32},\frac{945}{64})$

therefore

The time when the ball reach the maximum is 25/32 sec or 0.78 sec

step 2

At about what time did the ball reach the minimum?

we know that

The ball reach the minimum when the the ball reach the ground (h=0)

For h=0

$0=-16(t-\frac{25}{32})^{2}+\frac{945}{64}$

$16(t-\frac{25}{32})^{2}=\frac{945}{64}$

$(t-\frac{25}{32})^{2}=\frac{945}{1,024}$

square root both sides

$(t-\frac{25}{32})=\pm\frac{\sqrt{945}}{32}$

$t=\pm\frac{\sqrt{945}}{32}+\frac{25}{32}$

the positive value is

$t=\frac{\sqrt{945}}{32}+\frac{25}{32}=1.74\ sec$

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3 years ago

Evaluate f(x) = -x^2 1 for x=-3

Lynna [10]

Answer: 9

Step-by-step explanation: -(-3)=3^2=9

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2 years ago

PLEASE HELP!!!

4vir4ik [10]

v=πr^2(r+7) in my opinion is the correct expression

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