All Answers 358553 Answers

difference means subtract.

Subtract the little one form the big one

the site calc is on the home page.

look at this post it will help

Anon, it is a good idea to give the link to the original question when you post something like this. :)

Just copy it from the address bar and past it in. 

It's called using a calculator

9+10=19

Yea we turned a mean comment into a chatroom today.

I understand now 

Thank you very much for your help, much appreciated 

So first step is to get the 2r all alone.

-7.8 = 4.4 +2r

to do this you must subtract 4.4 from both sides. This will cancel it on the right side and add it to the left side 

-7.8 = 4.4 + 2r

-4.4 = -4.4

Now, you are left with the "2r all alone" from here you have to divide by 2 to get rid of it on the right side. Whatever you do to one side you must do to the other. So you are dividing both sides by 2.

-12.2 = 2r

-6.1 = r

^that is your solution.

yes 3/7 is a ratioal number

All except the Parisian offspring.....they're just French Fry(s)........

A = (-2, -7)         B = (6, -5)         C = (5, -2)

Use the distance formula to find the three lengths AB, BC, and AC.

If all three are equal, it's equilateral; if two are equal, it's isoscles; if all are different, it's scalene.

Also, see if the three lengths fit the Pythagorean Theorem; if so, it's a right triangle.

15%=0.15

12.6%=0.126

420%=4.20

I have moved the decimal point 2 places to the left each time

This doesn't make sense.

$${\mathtt{potatoes}}{\mathtt{\,\small\textbf+\,}}{\mathtt{6}} = {\mathtt{humans}}$$ so technically yes

I tried to answer it (and explain why my first answer was wrong) at the other time you asked.

its because 9 doesnt divide by 4

Yep, the answer is 12.3°.

I forgot to check my answer. With cosine, you get two possible answers, the answer that the calculator gives you plus another answer, its supplement.

So, if you take 180° - 167.7°, you get 12.3°.

Why should you know that you need to take the supplement?

Well, if the answer is 167.7°, it is a very large (obtuse) angle, and the side opposite it must be the largest side in the triangle; it must be very large when compared to the other two sides. It isn't  -- in fact, it's the shortest side, so angle A must be the smallest angle. Then, you need to subract your answer from 180°.

OK now?

3x+4y=10

subtract 3x from both sides

4y=-3x+10

then divide 4 for on both sides, including the -3x and 10

then you should get y=-3/4x + 10/4

simplify

y=-3/4x + 5/2 

your final answer should be f(x) -3/4x + 5/2

7x+2=8

7x= 8-2

7x=6

x=6/7

19, don't say no dumb 21.

Using the distnace formula, it would be 7 as your answer. 

Thanks soooo much Phil

Notice that when Tina starts, Sally has a 60 mile head start. But since Tina drives 10 miles per hour faster, she makes up 10 miles on Sally every hour. Thus, it takes her 6 hours to catch Sally.

Sally has driven 7 hrs at 60mph = 420 mles.

And Tina has driven one hour less - 6 hrs - at 70mph = 420 miles

And that makes sense !!!

do you think its a good idea?

Hmm....Never seen some one do this before.

guess so