3 x 3 = 9
3 + 3 = 6
Explanation:
3 works for both cases
Answer:

Step-by-step explanation:
Given

Required
Simplify the expression

Express the square root of 121 as 11


Express 90 as 9 * 10

Split the surd to 2

Express the square root of 9 as 3



Hence, the result of the expression is

3) 21,070
5) 600
6) 265
I couldn't see #4
Hoped this helped!
The slope of these lines is -17/7