Okay so you want to split 42 cards into 6 groups
1.5____ 2.5___ 3.5__ 4.5___ 5.5 __6.5
=30
We want to subtract 30 from 42 to see what we have left to divide
42-30=12
What number can go into 6 and equal 12
2
So we want to add 3 + 5 to get are answer
=8
Your answer will be= 8
-5(s+n)=-5(500)
-5s-5n=-2500
5s+10n=4000
5n=1500
n=300
s=200
21 and 22 because 21+22=43
H²+10h+21 = 0
h²+3h+7h+21 = 0
h(h+3)+7(h+3) = 0
(h+3)(h+7) = 0
h+3=0
h = -3
h+7=0
h=-7
To find the decreased percentage,here's what we can do:

In this case,the eqaution would be:

Hope it helps!