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The answer is 12.3 

I got the same answer as you but I can't seem to figure out how the answer is 12.3

Do you know how to get to 12.3

No?

some other generous person must be giving you those points then :))

This looks as if you are using the Law of Cosines:

(3.3^2) = (5.1^2) + (8.1^2) - 2(5.1)(8.1)cos(A)

I would first calculate the numbers:

10.89  =  26.01 + 65.61 - 82.62cos(A)

10,89  =  91.62 - 82.62cos(A)

Subtract 91.62 from both sides (do NOT combine it with the -82.62!)

-80.73  =  82.62cos(A)

Divide both sides by 82.62:

-0.977124 = cos(A)

To get the size of the angle, find invCos(-0.977124), which is 167.7°

If you have any questions about any of the steps, please ask.

im not

Yes that is true Jillybean :)

Alan or someone else, I have not used the table function before and I quite liked it but I cannot work out how to put in the borders.  

Would someone like to play with it and work this out please. ??

 5(y -1)2 - 20(x - 1)2 =64.

5(y - 1)² - 20(x - 1)²  =  64

If you place this into standard graphing form:  (y - 1)²/(64/5) - (x - 1)²/(64/20)  =  1

The distance from the center in the y-direction is √(64/5) = 8/√5.

The distance from the center in the x-direction is √(64/20) = 8√20.

The slope will be:  ±[8/√5] / [8/√20] = ±√20/√5 = ±√4 = ±2

I skipped a lot of explanation; if you want more explanation, please ask.

Only because you do not know how to do them yet. :)

say Tom and Jane have marbles in the ratio 4:5  and Jane has  30 marbles.

Let's see what info we can get from that.

I think it is much easier to set up a box like this. :)

this is the EASY way to do it :)

3x + 3 ≥ 2x + 6

x + 3 ≥ 6

x ≥ 3     --->  [3,∞)

10x + 3 > 5(2x + 1) - x + 7

10x + 3 > 10x + 5 - x + 7

10x + 3 > 9x + 12

x > 9     --->   (9,∞)

Okay, jill how is it going

You need to say a little about how to get the answer TayJay, otherwise the asker cannot learn anything

besides your answer is wrong :)

you can put it into the calc on the home page as  2+1/16 and press =

you n call me jill

if u want

srry i messed up every one makes mistakes

3.7 x 2 =  7.4

(3.7 x 10^4) x 2  =  (3.7 x 2) x 10^4  = 7.4 x 10^4

hi, jillybean

sorry Jillybean but that is not correct

you can use the onsite calc on the home page to answer this question.

or

if I was going to do it by hand I would say   11/30=1.1/3

and then I would set up a normal division to divide 1.1 by 3

You just need to line up the decimal points :)

You can find the answer:

1) by graphing

2) by completing the square

3) by using the formula:  -b/(2a) to get the x-coordinate:

    For this problem, a = 3 and b = -12   --->   -b/(2a)  =  -(-12)/(2·3)  =  12/6  =  2

    Now, replace 2 for x in the original function, to find the y-coordinate of the vertex.

    Then you will have your vertex.

*witch*

dang it i cant spell right

😝🌸🌺

I didn't know that gino - thanks.

ok 

im going to type in random on this so you know whitch one

$${\frac{{\mathtt{3}}}{{\mathtt{7}}}} = {\mathtt{0.428\: \!571\: \!428\: \!571\: \!428\: \!6}}$$

There you go - you can count them :)

You can use the calculator at this site to figure this out.

For any problem divided by n, there cannot be more than n - 1 digits in the repeating block; thus, the answer to this problem cannot be more than 6.

Talk to me at message center okay