All Answers 358272 Answers

it was a typo

Was that a typo? Or did you mean that literally?

0.72

I was not "carried away", I was simply being considerate, and providing your aging mind with reminders of fabulous posts to "jock your memory" you should be thankful! Lol

Yes, that would be a horrid thing to have our fearless headmistress deranged by any form of illness picked up by no more than a mutt...

5.5

Thurs 18/2/16     afternoon

1)  Dr Coldplay has added to her historical post - she has added on post on Nauseated.

Historical Post!

https://web2.0calc.com/questions/here-are-many-wonderful-old-posts-i-found-this-morning-i-hope-you-enjoy-reading-them-as-much-as-i-did

2)  Repeat question - Great answer from a guest  (Maybe Bertie?)

Solveit has drawn my attention to this question.  We'd like it to be looked at more please :)

http://web2.0calc.com/questions/x-is-a-real-number-x-sqrt-x-10-sqrt-x-3-0-x-1-x

3) Orbital Velocity      Not answered

http://web2.0calc.com/questions/physics_46791

4) Simple Harmonic Motion      Thanks Chris

http://web2.0calc.com/questions/no-idea-what-to-do-please-help

5) Substitution with indices   Thanks CPhill

http://web2.0calc.com/questions/brain-dead

6) Zeta function question   Not answered

http://web2.0calc.com/questions/zeta-function-question

7) Body temperature and kinetic energy.        SpawnofAngel and guest had a go but .....      

http://web2.0calc.com/questions/thermal-energy-temperature-and-heat

@@ What is Happening?  [Wrap4]   Thurs 18/2/16   Sydney,  Australia Time 12:31am   ♪ ♫

Good day to you all,

It has been busy!  Our fabulous answerers have been Cphill, Alan, Heureka, Geno3141, Nauseated, Rarinstraw1195, asinus, Olivia3.1315..., Solveit, Dakotadelene, Misaki, SpawnofAngel, GenericUserName, DarkBlaze347, Dragonlance and Anonymous4338.  Thanks all.  

Camelot News:

#  We have been having problems with the forum today.  I have lost a couple of posts which is always very frustrating.  I seriously hope this one post properly when i finish ://

1)  Problems with the forum   Thanks BreeDaBoss and DragonSlayer554

your hot

Thanks Heureka

I have studied Boolean logic but it was a long time ago and the symbols were different  :)

(That link doesn't work but it doesn't really matter )  ://

Dogs don't carry AIDS          They carry rabies.    

Yes sometimes Nauseiated does behave a little like he is rabid....

 I should definitely beware of his old bones.

Thanks for protecting me safe Coldplay. Nauseated can still give me flowers and chocolates though.  :D

Full Question:

Use the Law of Cosines to find the missing angle. In triangle FGH, g = 8 ft, h = 13 ft, and m<F = 72°. Find m<G. Round your answer to the nearest tenth.

Answer:

Use this equation

b^2 = a^2+c^2-2ac(Cos B)

a = 8, b = ?, c = 13

(Draw the triangle, it's easier to understand that way).

You would get b^2 = 8^2+13^2 - 2(8)(13)Cos B

233 - 208(Cos72)

233 - 64.27553484 = 168.7244652

168.7244652 squared is 12.98939818

This is side f.

Now use that in the Law of Sines:

Sin72 / 12.98939818 = SinG / 8

Sin72 = 0.9510565163

0.9510565163 x 8 = 7.60845213

Sin-1(7.60845213/12.98939818)

Make sure you're in degrees.

THE ANSWER IS 35.85551363°        OR      35.9°

Find the solutions of the following system. Then graph the system of equations to confirm your algebraic solutions.

2x-y=-3

4(x-2)+(y-1)=36

\(\begin{array}{rcll} (1) & 2x-y&=&-3 \qquad & | \qquad \cdot (-1)\\ & -2x+y &=& 3 \qquad & | \qquad +2x\\ & y &=& 3 +2x\\\\ (2) & 4(x-2)+(y-1) &=& 36 \\ & 4x-8+y-1 &=& 36 \\ & 4x+y-9 &=& 36 \\ & 4x+y-9 &=& 36 \qquad & | \qquad +9\\ & 4x+y &=& 36+9\\ & 4x+y &=& 45 \qquad & | \qquad -4x\\ & y &=& 45-4x\\\\ x: & 3 +2x&=& 45-4x \qquad & | \qquad +4x\\ & 3 +6x&=& 45\qquad & | \qquad -3\\ & 6x&=& 42 \qquad & | \qquad :6\\ & \mathbf{ x }& \mathbf{=} & \mathbf{7}\\\\ y: & y &=& 3 +2x \qquad & | \qquad x=7\\ & y &=& 3 +2\cdot 7\\ & y &=& 3 +14\\ & \mathbf{y} &\mathbf{=}& \mathbf{17} \end{array}\)

The radius of the first on is 4

The radisu of the second is 3

so the second one is 3/4 the size of the first one.   :/

4(x+y)+10y=16

12x+5(y+2x)=16

Joe places a mirror on the ground 60ft from the base of his school's clock tower. He walks backwards untill he can see the top of the tower in the mirror. At that point, his eyes are 6 ft above the ground, and he is 7.5 ft away from the mirror. How tall is the clock tower? How do I even begin to solve this????

The important thing to know here is that the angle of incidence must equal the angle of reflection.

So now this is our situation

Angle A and A' are both theta degres because they are altenate angles on parallel lines with th original thetas (angle of incident and angle of reflections.

This it is evident that these 2 triangles are similar,

so just like Dragonlance said.

\(\frac{h}{60}=\frac{6}{7.5}\\ h=\frac{6}{7.5}*60\\\)

6/7.5*60 = 48 feet

30 minutes

Physics is neat!  Thanks Dragonlance.

A parabola has its focus at (–2, 7) and its vertex at (–2, –2). What is the equation of the parabolas directrix?

Draw a skech and you can almost see the answer immediately.

The focus and vertex lie n the vertical line x=-2

The vertex is below the focus so it is concave up.

The focus and the directrix are 7--2=9 units apart.

so the directrix will be 9 units below the vertex.

-2-9=-11

The directrix is     y= -11

What do the symbols mean Heureka ?

Symbolic notation in Text notation:

(P⋁¬Q)⋀(¬P⋁Q)⋀(¬P⋁¬Q)  = ( P or (not Q)  ) and (  (not P) or Q ) and ( (not P) or ( not Q )  )

Symbolic notation in Text notation:

¬P⋀¬Q = ( not P ) and ( not Q )

⋁  = or

⋀  = and

¬   = not

¬P  = not P

¬Q  = not Q

P ⋁ Q = P or Q

P ⋀ Q = P and Q

I have absolutely no idea what the question is asking.  Someone may see my response and answer you though :/

i think:

P-Pat

K-Kate

P=K

Pat and Kate shared some stamps. Pat then gave 2/5 of what she had. How many more percent did Kate have than Pat in the end? (Round off to the nearest whole number.)

P-2/5P=3/5P (how many Pat left)

2/5P=2/5K

K+2/5K=7/5K(Kate s stamps whith 2/5 Pats)

Pat then gave 2/5 of what she had. How many more percent did Kate have than Pat in the end?

Let s found how many percent of P is K

(7/5)/(3/5) = 2.3333333333333333=2.33(aprox)

to find how many more percent:

233-100=133

Answer:133

what percent is 28 of 70

28/40*100% = 40%