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Try this web side: https://brilliant.org/wiki/cauchy-schwarz-inequality/

Did the textbook help ;)

Guest 2

I think it's C.

Let  y  =  amount of money you now have.

Let  s  =  amount of money your sister now has.

If you give your sister 5 dollars, you will have 5 fewer dollars (y - 5) and she will have 5 more dollars (s + 5).

Since they are now equal:  y - 5  =  s + 5     --->     y  =  s + 10

If your sister gives you 14 dollars, you will now have 14 more dollars (y + 14) and she will have 14 fewer dollars (s - 14).

Since you will now have twice as much money as she has:     y + 14  =  2(s - 14)

     --->     y + 14  =  2s - 28     --->     y  =  2s - 42

Combining the equations:  s + 10  =  2s - 42     52  =  s

Since  s  =  52     --->     y  = 62

A and B would apply to both types of plants, so yes C or D would be correct. Now which one of the two?

hmmm is it c or d?

This isn't a full question?

Guest 1 is not entirely wrong. If the question comes from a textbook then the answer is indirectly in your textbook. Think about the properties of non-flowering seed plants. 

Of the 47% of the students who are female, 11% are taking biology.

Therefore the probability of a randomly selected female is taking biology is:  11/47.

Do you have a guess as to what the answer might be? Can you eliminate some right off the bat?

My textbook has certain questions where you need to figure the answer out. This is one of them.

Math allows you to HAVE a future .....duh.

Ratio    1 : 4        so   one ran    1/(1+4)     and the other ran  4/(1+4)

1/5    and   4 /5     

1/5 x 1550 = ......

4/5 x 1550 = .....

D time =  M time -3       rate =  1/(M-3)

(1/(m-3)  + 1/m)(1 hr)   + 1/m (3 hr)   = 1 shelf   Use quadratic formula to

Solve for m = 6      then  d = 3   hrs to build alone

The formula for the squares of ODD numbers is:

n(2n+1)(2n-1)/3  = 

2007*(2*2007 +1) * (2*2007 - 1) / 3 =10,779,058,455

....and  

Miko has    2/7  * 210 = 60 stamps

So K  has    150-60 = 90 MORE stamps than M

Another way      total stamps = 210

    K has   (5-2)/7 = 3/7   more stamps     3/7 x 210 = 90 more stamps

=1/2 the diameter of the cube

Diameter = sqrt (1^2 + 1^2  1^2 ) = sqrt 3

1/2 of the diameter =     sqrt3 / 2

'speed of closure '   = 50 - 45 = 5 mph     1/3 m / 5 mph = 1/15 hr   ( 4 mins)

Average speed =Distance / time

                           =(60 x 2) / (2.5 + 3.5)

                           =120 / 6

                           = 20 km/h - her average speed to the beach and back.

I got the correct answer, using your reduce idea, I combined your solution and Geno's solution to get 5/18.

Basically, you only did half of what geno did, and I just added the other half with the reduce thing!

Ans: 5/18

Let the time when Daniel catches up with Frank =T (hours)

50T - 45T = 1/3, solve for T

T =1 / 15 of an hour. Or: 1/15 x 60 =4 minutes - when Daniel will catch up with Frank.

So the answer is 5/9 * 4/8 * 4/7? Which is 10/63 which is wrong. Maybe because in geno's solution, he added the probabilities together, but in yours you didnt?

Equation: y = sin x