Answer:
a-b=12
Step-by-step explanation:
(a²-b²)/(a+b) = 12
(a-b)(a+b)/(a+b)=12
a-b=12
Answer:
19 lawns
Step-by-step explanation:
well 64.99 is about $65
so you would need to mow atleast 19 lawns (this does not included tax XD)
Answer:
No, they aren't similar.
Step-by-step explanation:
<u><em>Let's take the proportionality of their sides to check whether they are similar or not:</em></u>

=> 2 ≠ 3
So, they are not similar.
Answer:
gallons
Step-by-step explanation:
Considering she waters her plants with 25 1/2 gallons i.e 51/2
and with the new system, she does it with 19 3/4 i.e 79/4
taking the difference:
=
gallons per day
For 30 days:
30 x
= 172.5 or
gallons