All categories

3 years ago

Help me please :(( I can't do this by myself..

Mathematics

1 answer:

meriva3 years ago

6 0

Answer:

k=4.25

Step-by-step explanation:

Hope i helped!

You might be interested in

I need help on this question plz

sergejj [24]

When 2 angles are supplementary, they both add together to equal 180 degrees. Therefore, choice 4 is correct because it adds 2x and 3x-15 together to equal 180 degrees

8 0

4 years ago

PLEASE PLEASE HELP AND I NEED YOU TO DO IT FAST BECAUSE I HAVE TO GO SOON

Greeley [361]

The height is modelled by the equation:

$h(t)=-0.2t^2+2t$

Therefore

$\begin{gathered} \text{ } \\ \frac{\text{ dh}}{\text{ dt}}=-0.4t+2 \end{gathered}$

At the maximum height dh/dt = 0:

Hence,

$\begin{gathered} -0.4t+2=0 \\ -0.4t=-2 \\ \text{ Dividing both sides by -0.4} \end{gathered}$ $\begin{gathered} \frac{-0.4t}{-0.4}=\frac{-2}{-0.4} \\ t=5 \end{gathered}$

Hence, the ball gets to the maximum height after 5s.

The maximum height is given by h(5):

$h(5)=-0.2(5)^2+2(5)=5$

Therefore, the maximum height is 5 ft.

When the ball reaches the ground h(t) = 0:

$\begin{gathered} -0.2t^2+2t=0 \\ \text{ Dividing both sides by -0.2, we have:} \\ t^2-10t=0 \\ Factorising\text{ the left hand side, we have} \\ t(t-10)=0 \\ \text{ Therefore,} \\ t=0,\text{ t=10} \end{gathered}$

The ball reaches the ground in 10s

8 0

1 year ago

F(x)=x^2+6x+3 complete The square and put the equation into vertex form

Svet_ta [14]

Answer:

y=(x+3)^2−6

Step-by-step explanation:

im not 100% but i think its right

6 0

3 years ago

Read 2 more answers

If the length of segment A'B' is 12 units, what is the scale factor of the dilation?

Andreyy89

Answer:

if the length of segment A'B' is 12 units, what is the scale factor of the dilation?

Step-by-step explanation:

3 0

3 years ago

Creat a table of values for the equation y=-x-3

nadya68 [22]

Answer:

x /\ y

1 /\ -4

2 /\ -5

3 /\ -6

4 /\ -7

... /\ ...

Step-by-step explanation:

4 0

3 years ago