Answer : 
(1) 
Use FOIL method to mulitply (3x – 5)(3x – 5)

(2) 
Use FOIL method to mulitply (3x - 5)(3x + 5)

(3) 
Use FOIL method to mulitply -(3x + 5)(3x + 5)

(4) 
Use FOIL method to mulitply -(3x + 5)(3x - 5)

So equation 2 is true
#9: 1 and 1 seventh
#10: 1.23
#11: 0.35
Answer:
x²y²+xy²+3+xy+2y²
Step-by-step explanation:
(2x²y²+x²y+xy²+3)-(x²y²+x²y²+x²y-xy-2y²)
1. remove the parentheses (when there’s - in front of an expression in parentheses change the sign of each term of the expression)
2x²y² + x²y + xy² + 3-x²y² - x²y² - x²y + xy - 2y²
2. eliminate the opposites
2x²y² + xy² + 3 -x²y² + xy +2y²
3. collect like terms
x²y² + xy² + 3 + xy + 2y²
Hello!
<u><em>Answer: =14.858</em></u>
Explanation:
Multiply by the numbers. Product it can also multiply by the numbers, fractions, decimals, factors, and multiples.
3.4 it has one decimal place.
4.37 it has two decimal place.
So, the answer it should be have a three decimal places.

Hope this helps!
Thanks :)
-Charlie
Supplementary means 180
180-32=148 hope this helps