What is the probability that three number cubes rolled will each show an even number?

1/8.

Step-by-step explanation:

There are 3 even numbers out of 6 on a number cube.

So for one number cube the chance of an even number = 3/6 = 1/2.

For 3 cubes it is (1/2)^3 = 1/8.

step-by-step explan mxfcg'k; uafwgzfgjhklhgation:

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.