CPhill

-18 * 3  = -54

-18 + 3  = -15

Note, jc

Consider a single die......let's look at the probability of rolling a "1"   .....this is given by

[Number of ways a specific outcome could occur ] / [ Number of total outcomes]  =  1 / 6

But odds are different......the odds in favor  of an event happening  are given as:

[Number of ways a specific outcome could occur] : [ Number of all other possible outcomes]

So......rolling a "1" could happen in 1 way.......and the number of other outcomes possible is 5...we could roll a 2, 3, 4, 5, or 6,   instead

So......the odds in favor of rolling a 1   =   1 : 5   =  1 to 5

So...in our problem......the odds in favor of having a heart attack  =

[30 people have a heart attack ] : [ 970 people don't]  = 30 :  970

Does that make sense ???

[ People often  use the terms "probability' and "odds" interchangeably. They are not the same, technically.....!!!  ]

It won't be a whole number ....it will be a decimal

39.892%  =    .39892

No prob !!!!

1mm = 0.1cm

So....12mm  =   1.2 cm

So the area is

A = pi* (1.2cm)^2  = 

pi * 1.44 cm^2   = 

about   4.52 cm^2

[1/3] / [1/4]   =

[1/3] * [4/1]  =

4/3 cups of water for each cup of milk

Proof  :   (1/4) (4/3)  = 1/3

a_n  = a₁  + d(n -1)

Where a_n   is the nth term you are looking for, a₁ is the first term, d is the common difference between terms and n is the index on a_n

Here's more : http://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html

Note  2 + 2/3   =  [3*2 + 2] / 3   =  [ 6 + 2] / 3  =  8/3

So....

8/3   - 2/3   = 6/3  = 2

This makes sense.......  [2 + 2/3 - 2/3]   should  = 2   !!!

This is a 6 - 8 -10  right triangle......so  6 + 8 + 10  =  24 yards  total

[You will need 8 more yards ]

This is known as an "absolute value" function...in this case the absolute value graph  of  3-x

Here's the graph :  https://www.desmos.com/calculator/iwhqljrm3d