Answer:it is 18*20 effective every year
Step-by-step explanation:
Addd 4 to both sides

sqare both sides
x+9=25
minus 9 both sides
x=16
plug it in for x and see



1=1
true
not extraneous
an extraneous root would be x=-34
Answer:
no habla español
Step-by-step explanation:
Put this into a scientific calculator
1/3 x pi x 18 squared x 16
Answer:
1/4.(-96)=2x-3
-1/4.96=2x-3
-24=2x-3
-2x-24=-3
-2x=-3+24
-2x=21
x=-21/2
Step-by-step explanation: