Answer:
21n² - 28n + 7
Step-by-step explanation:
Each term in the second factor is multiplied by each term in the first factor, that is
3n(7n - 7) - 1(7n - 7) ← distribute both parenthesis
= 21n² - 21n - 7n + 7 ← collect like terms
= 21n² - 28n + 7
 
        
             
        
        
        
Answer:
-23/4 ft
Step-by-step explanation:
Combine -2 1/2 ft with -3 1/4 ft.  The result will be -5 3/4 ft, or -23/4 ft.
 
        
             
        
        
        
Answer: $ 568.99
Because 18.99+22 x 225/9 = 568.99
 
        
             
        
        
        
Answer:
he didnt subtract each equations on both sides
5y-6=4y+1
-4       -4
 y  -6=1
   +6=+6
y=7
Step-by-step explanation:
hope that wrk