Answer:
1/6
Step-by-step explanation:
There are 4 cards, 2 of which are primes
P(prime) =number of primes/total
= 2/4 = 1/2
Keep the card, now we have 3 cards, 1 of which is a prime
P(prime) =number of primes/total
= 1/3
P(prime, keep , prime) = 1/2*1/3 = 1/6
I don't know but it's.
But I don't know what's an explicit function.
A=LW
L=W-4
A=252
sub W-4 for L
A=(W-4)(W)
252=(W-4)(W)
252=W²-4W
minus 252 both sides
0=W²-4W-252
what 2 numbers multiply to get -252 and add to get -4
-18 and 14
0=(W-18)(W+14)
set to zero
W-18=0
W=18
W+14=0
W=-14
false, we can't have negative width
Width=18
L=W-4
L=18-4
L=14
length=14cm
width=18cm
So pretty, wow so gorgeous!!!!!