Yes you do need to regroup it would be 4
The small and large triangles are similar
so 3 / (3+3) = 9 / AC
9 / AC = 1/2
#AC = 18 ft Answer
15-7n=4———Fifteen minus the product of seven and a number is four
15/(n+7)———The only answer that says divided
15(n+7)———The first box
15-4n=7———The top right box
7n-15=4———The bottom left box
:))))
This week the number of lawns "times" 25 and his allowance = $345
Therefore...
25x + 20 = 345
- 20 -20
25x = 325
Now divide both sides by the coefficient (25)... and that will be the number of lawns he mowed.
Hope this helps!
