Given P(A)= 0.5, P(B)= 0.25 and P(A and B)= 0.185, find the value of P(A or B), rounding to the nearest thousandth, if necessary

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.

the answer would be  

a.

3: 1

step-by-step explanation: