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earnstyle [38]
2 years ago
15

Please help me on this! will give you brainliest, thank you.

Mathematics
2 answers:
vazorg [7]2 years ago
7 0

Answer:

a=music

b=3

c=mary and dan

hammer [34]2 years ago
4 0

Step-by-step explanation:

a) music

b) 3 students

c) Mary and Dan

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Answer:

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2 years ago
A ball is thrown from an initial height of 2 meters with an initial upward velocity of 9/ms . The ball's height h (in meters) af
Alecsey [184]

A ball is thrown from an initial height of 2 meters with an initial upward velocity of 9/ms

Balls height h= 2 +9t -5t^2

To find all values of t for which the ball's height is 3 meters

We plug in 3 for h and solve for t

h= 2 +9t -5t^2

3 = 2 +9t -5t^2

Solve for t

0= -1+ 9t -5t^2

5t^2 - 9t + 1 = 0

Solve using quadratic formula

t= \frac{-b+- \sqrt{b^2-4ac} }{2a}

t= \frac{9+- \sqrt{(-9)^2-4*5*1} }{2*5}

After simplifying this,

t= \frac{9+\sqrt{61}}{10} = 0.11898

t= \frac{9-\sqrt{61}}{10} = 1.68102

the values of t for which the ball's height is 3 meters= 0.12 sec , 1.68 sec

5 0
3 years ago
Two functions are given below: f(x) and h(x). State the axis of symmetry for each function and explain how to find it.
Studentka2010 [4]

Answer:

Step-by-step explanation:

f

(

x

)

=

−

4

(

x

−

8

)

2

+

3

Set the polynomial equal to  

y

to find the properties of the parabola.

y

=

−

4

(

x

−

8

)

2

+

3

Use the vertex form,  

y

=

a

(

x

−

h

)

2

+

k

, to determine the values of  

a

,  

h

, and  

k

.

a

=

−

4

h

=

8

k

=

3

Since the value of  

a

is negative, the parabola opens down.

Opens Down

Find the vertex  

(

h

,

k

)

.

(

8

,

3

)

Find  

p

, the distance from the vertex to the focus.

Tap for more steps...

−

1

16

Find the focus.

Tap for more steps...

(

8

,

47

16

)

Find the axis of symmetry by finding the line that passes through the vertex and the focus.

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image of graph

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2 years ago
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