Answer:
4a²-9
Step-by-step explanation:
(2a+3)(2a-3) = (2a)²-3² {<em>Difference</em><em> </em><em>of</em><em> </em><em>two</em><em> </em><em>squares</em><em>}</em>
= 4a²-9
This is a division problem so we have to do 6÷116.
Albert is walking twice ( 8/4) as fast as Kimbelry so Kimberley's speed is 1.5 yards per second.
So when Albert catches up he walks 6 + x yards while Kimberley has walked x yards.
x = 1.5t and 3t = 60 + x
3t = 60 + 1.5t
1.5t = 60
t = 60/1.5 = 40 seconds (answer)
So the time to walk 60 yards
