Here you go! Hopefully it was correct as i used an app called Cymath.Please mark me as Brainliest!
 
        
             
        
        
        
5/14 is the answer. I'll do my best bud
Answer↑
Steps↓
Convert 2 1/2 to an improper fraction:
2 + 2+ 1 over 2
Once you add the numbers, that will be 5/2.
 Now, multiply that with 1/7:
5/2 • 1/7
Your answer will be 5/14
Therefore, Rock A weighs 5/14 pounds
        
             
        
        
        
Answer:
The equation of the line that passes through the point (3,4) and has an undefined slope is x = 3
Step-by-step explanation:
- The slope of the horizontal line is zero
 
- The equation of the horizontal line passes through the point (a, b) is y = b
 
- All the points on the horizontal line have the same y-coordinates
 
- The slope of the vertical line is undefined
 
- The equation of the vertical line passes through the point (a, b) is x = a
 
- All the points on the vertical line have the same x-coordinates
 
Let us solve the question
∵ The line has an undefined slope
∴ The line is a vertical line
∵ The equation of the vertical line is x = a, where a is the x-coordinate
    of any point on the line
∵ The line passes through the point (3, 4)
∴ a = 3
∴ The equation of the line is x = 3
The equation of the line that passes through the point (3,4) and has an undefined slope is x = 3
 
        
             
        
        
        
Answer:
Then the correct answer would be to two decimal places. Credit to 25rx0162.
Step-by-step explanation
Hope this helps : )