The correct answer is 6*10^-6 ..........................
Did you ever do this if so do you have an email I can message you on. I've been stuck on this.
Answer:
x=6
Step-by-step explanation:
I would look at this triangle and notice that x can be solved by setting up a ratio.
I generally put the short side of the triangle on the top and the long side on the bottom
4/x = x/9
You then cross multiply to get 36=x^2, or +-6=x
A length of a triangle cannot be negative, so we are left with the answer x=6
x^2 = 81/100
Let's take the square root of each side
x = 0.9 and -0.9
The answer is B) 20
Because you have 5 brands and you combine each with the 4 others, so 5*4=20
