What do you mean is there an image
Hello :
<span>a single expression is : A = xy +zk
x : </span> width1 y : <span>length1
z : </span>width2 k : <span>length2
A : </span><span>the total area of the two rooms
note :
A1 = xy ........</span>area of the room 1<span>
A2 = zk </span>.......area of the room 2
This kind of problems are solved using Bernoulli's distribution. Everytime you have a win/lose scenario, and you know the probability
of winning, and you want
successes over
trials, you have the following probability:

You want the probability of having at least three successes, i.e. you are interested in the cases k=3 and k=4. The corresponding probabilities are


So, the total probability is 
We have been given an equation
. We are asked to find the decimal coefficient of the equation.
We know that coefficient of an equation is the number multiplied by variable.
We can see that
and 1.5 are constants for our given equation.
We can see that variable of our given equation is
. We can also see that
is being multiplied by 0.5, therefore, 0.5 would be the decimal coefficient of our given equation.
Write the folowing in standard form and you well get
#1 is 5b
#2 is b−8x+<span>4</span>