They can rent the boat for 7 hours if u add 50+25×7 it equals $225.
David will have 2.57 seconds to get to mark and it’s 50 meters
To solve for j, cross multiply:
4 x 45 = 18 x j
180 = 18j
Divide both sides by 18:
j = 10
Yes it is true because if 3x +15=2x+60 it is true
