Melody

5(6*10^3+400) in standard form?

5(6400) = 32000 

Now you have to have just one digit in front of the decimal point  so that is   3.200

now 32000 is a big number (bigger than 1) so the power will be positive

The number was 32000.

Now it is             3.2000

How many numbers did you have to jump the point over?    That is the power.

so the answer will be      3.2000 x 10^ however many places you moved the point

Would you like to tell me the proper answer now?   :)

What is the area and perimeter of a rectangle with a width of 5.7m and a length of 8.6 equal

Ok, I want you to draw a rectangle on a peice of paper.

Now put 5.7m and 8.6m on two of the sides.

Now i want you to put the lengths on the other two sides as well.

Now the perimeter is the distance around the outside.  

You tell me how to find that and what the answer is please :)

Find the measure of an exterior angle in a regular 21-gon.

3 sides     180 degrees total

4 sides      180(4-2)

5 sides       180(5-2)

n sides angle sum is 180(n-2)

21 sides angle sum is 180(21-2) = 180*19 = 3420

each angle in a regular 21-gon will be           3420/21 = 162.8571429 degrees  (apprrox)

external angle = 360 - 162.8571429 =  197.1428571degrees = 197 degrees 8 minutes and 34.29 seconds approximately

Oh, I just realizedthat guest thinks you mean 2 cards out of a deck of cards.

Really your question is too vague.  We do not know what you mean :((

But the numbers will be multiplied together - not added. :)

You pick a one of two card, roll a 6 sided  die, spin a two sided spinner, and find the sum. How many different sums are possible? Please help

I will assume all the numbers are different. and no 3 produce the same sum.

Then there will be     2*6*2=24 different possible outcomes.

Of course,

People who become known as keen students recieve a great deal of help and encouragement here.

You may have to put yourself forward  -

Be quick to comment on answers, it doesn't matter if you are saying thankyou or if you are saying you still do not understand :)   Never say you understand if you do not!

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Hey kids, why don't you give yourselves names?

I'd like you to join up but if you don't want to you could still choose a name and put it on all your posts.

That way people would know if they are talking to the same guest or a different one. :)    

(-4,-5);Undefined slope

y=mx+b

-5=m*-4+b

-5=-4m+b

b=4m-5

y=mx+4m-5

jc and Hayley,  

Why don't you both join up?

It is better here if you are a proper part of the community.  It is free and easy.   

Time?