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Very nice, Melody.....I'd have no idea how to approach this one !!!!

Very nice, Geno.....I would dispute that mine is more "elegant"....more like...."calculator aware".... LOL!!!

(Plus.....a little knowledge about the proprties of Phi and phi....!!)

Nice selfie! :D

"A" is the correct answer......its the basic absolute value value function. y = 3l x l is the basic function that is "compressed" horizontally.....

Let N be the number of nickels.....then the number of quarters are .20N

And we have the value of each nickel times their number plus the value of each quarter times their number equals the total value.......thus......

.05N + .25(.20N) = 6.00        simplify

.05N + .05N = 6.00

.1N = 6.00    divide by .1 on each side

N = 60 nickels

And the number of quarters  = .20(60) = 12

$$9.165\times 10^{-3}$$

x = number of 3 dollar tickets, y = number of 5 dollar tickets

3x + 5y = 230

x + y = 50 so y = 50 - x.  Put this in the first equation:

3x +5(50 - x) = 230

3x +250 -5x = 230

-2x = -20

x = 10

y = 50 - 10

y = 40

.

20 "Hunt For Wild Pikachu" man......

s = sheep,  c = chickens

5s + 3c = 99

c = 2s

Replace c in the first equation using the second:

5s + 3*2s = 99

11s = 99

s = 9

c = 2*9

c = 18

So, 9 sheep and 18 chickens

.

Here's my answer

All saw yellow bird 5

Bierber saw 4 yellow birds, yellow bird 4 was seen by him only, yellow bird 2 was seen by him and Brent and not seen by Corrigan, yellow bird 3 was seen by him and Corrigan and not seen by Brent

Corrigan saw 3 yellow birds and one non-yelllow bird. He and Bieber see yellow bird 3 that was not seen by Brent. He and Brent see non-yellow bird 2 that is not seen by Bieber.

Brent saw 2 yellow and 2 non-yellow birds. He sees non-yellow bird 1 that is not seen by the others.

5 yellow birds were seen....2 non-yellow birds were seen.

if n = number of nickels and q = number of quarters, we have:

5n + 25q = 600

and 

0.2q = n or q = n/0.2

Put this last back in to the first equation:

5n + n/0.2 = 600

5n + 5n = 600

10n = 600

n = 60

S0 there are 60 nickels and 12 quarters.

Check

$${\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{5}}{\mathtt{\,\small\textbf+\,}}{\mathtt{12}}{\mathtt{\,\times\,}}{\mathtt{25}} = {\mathtt{600}}$$

.

We need to find the area. Given three sides, we can use Heron's formula:

     Area  =  √[ s·(s - a)·(s - b)·(s - c) ]     where the semiperimeter     s = (a + b + c) / 2

     a  =  10          b = 13          c = 14

--->   s  =  (10 + 13 + 14) / 2   =   18.5

--->   Area  =  √[ 18.5·(18.5 - 10)·(18.5 - 13)·(18.5 - 14) ]   =   62.4

--->   Weight  =  62.4 x 1.7  =  106 ounces

I would suggest using the calculator at this site.

99 + 99/99

Okay.  Glad I could help......

yes much better now it is correct

Reread my answer.  Better?

Okay.  I see.  Read it wrong. Thanks. I'll edit.

you forgot to add in the yellow birds that were seen by more than one person

You're not a carrot

How?  Each saw 1 bird the other didn't.  3 birds witnesses.  Each pair saw a bird the other didn't. 6 more witnesses. They all finally saw one bird.  3 witnesses.  They all saw 4 birds.  What did I do wrong?

you were wrong

5 yellow birds.  2 other colored