Since we know that squares have the same length on all sides, you would find the square root of 170
√170=13.03840481
rounded to the nearest tenth would be 13.1
You can check your work by multiplying 13.1 by 13.1 which equals 170.3
I try to explain the problem and give the answer, I hope this helps!
Answer:
x=5
Step-by-step explanation:

cross multiply
45=9x
solve for x by dividing 9 to get x alone
5=x
Answer:
its to blurry
Step-by-step explanation:
It’s solved by using the cosine rule