Ask question

Ask question

All categories

Thepotemich [5.8K]

3 years ago

11

yall its an easy khan academy assignment please help ASAP i needa turn it in by 11:59 pm todayyy so hurry i will give 50 points!

!!! and brainliest to whoever is righttt

2 answers:

MariettaO [177]3 years ago

6 0

Answer:

The answer is B.

Step-by-step explanation:

kondaur [170]3 years ago

6 0

Answer:

B ITS B ! GOOD LUCK!!!! :D

Step-by-step explanation:

You might be interested in

In the month of June, the temperature in Johannesburg, South Africa, varies over the day in a periodic way that can be modeled a

Art [367]

Answer:

The answer is " $\bold{T = - 7.5 \cos \frac{\pi}{12}( t - 4 )+ 10.5}$ "

Step-by-step explanation:

Given value:

Temp-maximum= $18^{\circ}$

Temp. minimum = $3^{\circ}$

It is halfway between 10 am and 10 pm to 4 am.

The sinus and cosine roles could be used throughout the year to predict fluctuations in climate models. Its type of formula that can be used to model such information is:

$T = A \cos B(t-C) + D,$ where parameters are A, B , C, D, T is the ° C temperature and t is the time (1-24)

$A = amplitude = \frac{(T_{max} - T_{min})}{2}\\\\$

$= \frac{(3 - 18)}{2}\\\\= - \frac{15}{2}\\\\ = -7.5$

$B = \frac{2 \pi}{24}\\\\$

$= \frac{\pi}{12}$

$C = \text{ units translated to the right}= 4$

$D = y_{min} + amplitude = units \ translated \ up\\\\$

D = 7.5 + 3 = 10.5

Its trigonometric function equation that model temperature T hours after midnight in Johannesburg t.

$T = - 7.5 \cos \frac{\pi}{12}( t - 4 )+ 10.5$

6 0

4 years ago

Which point would be reflected across the y-axis to (-3,-9)

OlgaM077 [116]

Answer:

b

Step-by-step explanation:

when an reflected across the y axis only the x value changes and it changes negatively

4 0

3 years ago

Kevin has $50 and wants to buy some art paper and paints. One pack of art paper costs $12, and the paints cost $6 per tube. He b

lara [203]

Answer: 4

Step-by-step explanation:

2(12) + 6n ≥ 50

24 + 6n ≥ 50

6n ≥ 26

n ≈ 4

The maximum number of tubes of paint that Kevin can buy is 4.

4 0

3 years ago

Read 2 more answers

QUESTION 3 of 10: Stock returns vary from year to year. The more variance a stock displays the greater the potential risk. These

Dahasolnce [82]

Answer:

The variance of these investment returns is 74

Step-by-step explanation:

Given:

Series = 10, 30, 15, 5, 20

To Find:

variance of a series = ?

Solution:

The variance of the series = $Var\left(X\right)=\sum _{i=1}^n\frac{\left(x_i-\bar{x}\right)^2}{n}$

$\bar{x} = \frac{10+30 +5+15 + 20}{5}$

$\bar{x} = \frac{80}{5}$

$\bar{x} =16$

Now $(x_i -\bar{x})^2 =$ $(10 -16)^2 + (30 -16)^2 + (5 -16)^2 +(15 -16)^2 +(20 -16)^2$

= $(-6)^2 + (14)^2 + (-11)^2 + (-1)^2+ (-4)^2$

= 36 + 196 +121 + 1+ 16

= 370

Now

$Var\left(X\right)=\frac{370}{5}$ = 74

6 0

3 years ago

Read 2 more answers

What is the vertex?<br> f(x) = -x2 - 4x + 12

bekas [8.4K]

Answer:

-2, 16

Step-by-step explanation:

6 0

3 years ago