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42/6 = 7

7=12 = 19

19 Is the answer

Hi Guest,

Thanks for the input.

You have given good insight into a number of questions.

It would be really good if you became a member, it is easy and free and i do not believe you will get more junk mail or any other 'nasties' as a consequence.

I would like to know when you are answering, be able to find you older  answers, and get to know you.  If you were a member I would be able to do much of this through your member page.

If you really do not want to join then please sign your contributions so that they are fully recognisable.  It will be nowhere near as good as being in your member name though.

The distance from the house to the foooood   is the same as from the fooood to the next house

x coordinate   -1 to -3   is -2   add another -2     to get   -5 = x

y coordinate    4  to 2    is -2   add another -2   to get     0  = y

https://web2.0calc.com/questions/please-help-i-really-don-t-know

You can use the FOIL (Firsts, Outers, Inners, Lasts) method to expand this.

1. (5x+6v)(5x+6v)

2. 25x^2 + 30xv + 30xv + 36v^2

3. 25x^2 +60xv + 36v^2

The number of degrees in the interior angles of a hexagon is 720°.

Since the hexagon is equiangular, each interior angle is 120°.

Therefore, each exterior angle of the hexagon is 60°.

This means that each one of the exterior triangles created on the hexagon is an equilateral triangle.

The sum of the two exterior sides of each triangle is equal to twice the length of the side of the hexagon.

Since the perimeter of the hexagon is 15, the sum of the sides created on the exterior of the hexagon is twice this, or 30.

.6 lb   x   6.95 $ / lb       =   amount to pay  

 _  lb     x     __   $ / lb         See how the 'lb' cancels out ?   You are left with only $  

I will assume these says   12  SESSIONs

Let x = individual students

then 12- x  = group sessions

Income from individuals    x    is   25 x

Income from group  is                18(12-x)         added together this equals  265

25 x    +  18 ( 12-x)   = 265        solve for x , the individuls, then group# =   25-x

Thank you so, so much!

You roll two dice. What is the probability that the average of the high and low roll is exactly 3, to four decimal places?   

The first die can be one of six numbers. 

For each of those six numbers, the second die can be one of six numbers.

Thus, there are a total 36 possibilities that the two dice can land.

To average the total of the numbers that the two dice land on, you have to divide by two. 

Thus, to average three, the total has to be six.

How many ways are there to roll a six?  There are five ways:  1-5, 2-4, 3-3, 4-2, and 5-1 

So the likelihood of rolling a total of six is 5 opportunities out of 36 possibilities.

That's written as 5/36 which, to four decimal places, quotients out to 0.1389 or 13.8889% if that's the form the problem wants.   

I see a possible flaw.  One of the possibilities is to roll a 3-3.  Since they're the same value, there is no "high" and "low".

If this is to be taken into account, then the probability would be 4/36.  You can do the arithmetic to get it in decimal form.

_.

1 5

5 1

4 2

2 4

3 3        5 possibles out of 36 possible rolls        5/36     5/36 = .1389

1. The maximum is 128.

2. The missing angle is 75 degrees.

3. E is 45 degrees.

# pennies = x          value in pennies = .01 x

# nickles  =  x+6      value in nickles =  .05 (x+6)         added together = .66

.01x    +   .05 (x+6)   = 0.66        solve for x  (pennies) then nickles = x+6

The ratio is 3/5.

The smallest perimeter is 20.

To find the total books, find 15 * 4 / 5.

First do 15*4. Then, divide what you get by 5.

You are very welcome!

:P

The areas of two similar polygons (and all regular pentagons are similar polygons) has the same ratio as the squares of the corresponding sides.

One-fifth of 250  =  (1/5) x 250  =  50.

1.  Looking at the coefficients:  +1, -2, +11, +5, +6, there are two changes of signs; thus, only (b) has a chance of being correct.

2.  (c) is correct.  

x + y = 57       x = 2 pt shots      y = 1 pt shots

2x +y = 99             I think you can solve this system..... From the first equation  y= 57-x     substitute this into the second equation...and proceed

Hypotenuse (from pythag theorem) = sqrt 80

Tan A = opp/adj =  4/8 = 1/2

Sec a = 1/cos a =   1 /(adj/hyp) = hyp/adj = sqrt 80 / 8 =   4 sqrt 5  / 8 == sqrt5 / 2

sin a = opp/hyp =4/sqrt80    1/sqrt 5  = sqrt5/ 5 

The formula to find the number of degrees in each vertex angle of a regular polygon is:  Degrees = (n - 2) · 180 / n

Each angle of an equilateral triangle is 60°.

In a regular octagon, n = 8  and  Degrees = (n - 2) · 180 / n     --->      Degrees  =  (8 - 2) · 180 / 8     --->    Degrees  =  135°.

Since there are  360°  around a point, the number of degrees in each vertex of the regular n-gon is: 

                             360° - 60° - 135°  =  165°.

To find the value of n:  165°  =  (n - 2) · 180 / n   

 --->                          165 · n  =  (n - 2) · 180

 --->                             165n  =  180n - 360

 --->                              -15n  =  -360

 --->                                    n =  24

The standard form of a parabola's equation is generally expressed:

y=ax2+bx+c

y^2−4x+4y−8=0 .     But this is a sideways parabola

Solve for x

4x = Y^2 +4y -8    divide by 4

x = 1/4 y^2 + y -2  

Thisw is the same as experimental probability...

21 times for B out of 36 trails (spins)      21/36 =  7/12

Travis' age will always be 3 years LESS than his sister's age , s .

Age of Travis = s-3