Answer:

Step-by-step explanation:
We can use properties of exponents to solve these equations. Remember that when multiplying exponents, we 'add' them.
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For the next question:

These are your answers!
Let's call the short side "s"
short side = "s"
middle side = 3s
longest side = 2*3*s
perimeter = 45 cm
perimeter = s + 3s + 6s = 45
short side = 4.5
middle = 13.5
long side = 27
4.5 + 13.5 + 27 = 45
Try this website, I don't know too much about this stuff but I found a website that explains by text and video. http://www.statisticshowto.com/how-to-use-a-probability-tree-for-probability-questions/
A is 25a+8
B is b-18
hope this help you
let me know is wrong or right?