Answer 9-12 (you can just google it)

0

Step-by-step explanation:

First we solve for 9 and 12

9)3+6x-2=31=5

12)x+4x-1+=24=5

Now we know the answers for 9 and 12 and we subtract them

5-5=0

so our answer would be 0

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!