All Answers 356015 Answers

Again Lisa, you need to use brackets better

(sin pi)/5 = 0

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

sin(pi/5)

Well wolfram alpha giives an exact value here.

your brackets are not balanced Lisa ....

perhaps you mean

(1+ sqrt( 2/2)) / (sqrt (2/2))     ??

or

(1+(( sqrt 2)/2)) / ((sqrt 2)/2)   ??

or

something else???

bout` 3 not counting the two mins it took me to type this

You are correct....that was in my correction.....but you may have posted before I corected it!  Good call!

EP: I don't know much about physics, but shouldn't the 5 seconds' delay by the police officer be taken into account in the sense that the speeder has already travelled: 5 x 45 =225 meters??.

7 000 000 98

700 000 098

seven hundred million and ninety eight

Depends

(-21^2) =441

-(21^2)= -441

Is the function y= 7 sin (2x - 3pi/2) even or odd?? How do you figure it out?

f(x)=7 sin (2x - 3pi/2)

f(x)=7 [sin (2x) cos(3pi/2)- cos (2x) sin(3pi/2)  ]

f(x)=7 [sin (2x) *0- cos (2x) *-1  ]

f(x)=7 [0+ cos (2x) ]

f(x)=7 cos (2x) 

f(-x)=7cos(-2x)

f(-x)=7cos(2x)

f(-x)=f(x)

Therefore this is an even function.

Is the function y= 7 sin (2x - 3pi/2) even or odd?? How do you figure it out?

Hi Lisa, :)

Before I give a specific answer I think it would be a good idea for you to watch this and then you will probably be able to answer your own question.

It is a bit long I know  but if you odd and even really mean it should stick in your brain a whole lot better.

CORRECTION:      wrong units    corrected below and added distance for 5 seconds

Speedster displacement= 162 k/hr  x t      Which equals   162 x 1000/=3600 m/s = 45 m/s       45 x t    + (45 x 5) = displacement

Police car  x= displacement = x0 + vo t + 1/2 at^2     (x0=0  vo t =0)  and it has to equal     45 x t + 225

so

45t +225 = 1/2 at^2

90t +450 = at^2     and a=6

6t^2 - 90t-450=0

t^2 -15t-75=0

Quad formula    15+-sqrt(225+300)  / 2  =     18.95 seconds

Hope i did that correctly!                                       

Acceleration is constant.

MT.....does the car keep accelarating until it catches the speedster in your answer?

.51988 trillion/2.37 trillion  = .21935865

If this helps, the answer is 30.4 seconds. However, I always get different solutions. 

.2  is    2/10     so it could be  sqrt2/sqrt10     or  .4472135  according to the CALCULATOR on this website....LOL

Hey diddle diddle,

the median's the middle,

You add and divide for the mean,

The mode is the one that you see the most,

and the range is inbetweeen  :)

Yes, thanks guest :)

I did it the same way and got the same result :)

Divide the numerator by the denomonator

Example: 3/4, three divided by four =.75

Using a calculator might help.

1) Let D be the distance that Tom has travelled between the time he called his mother and the time she catches up to him.
2) His mother has travelled: D +10
3) By the time he gets to the airport, Tom has travelled: D + 5 since he called his mother, and she has travelled: 10 + 2D.
4) Since the speeds of the 2 vehicles are constant over their respective journeys, the RATIOS of the distances travelled must be the same.
5) In other words:  [D+5]/D =[10 + 2D]/[D+10] , solve for D. D = 10 Km. Hence the total distance is:
10 + 10 + 5 = 25 Km. That is my take on it!!!!.

Look under the heading LaTex    under the math heading there...

it depends what type of math you are doing

The answer is: 9624125.04784!    

it equals

25

Here is the graph.

​

Thanks Jacob.

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