Solve the equation for k: 4k - 7 = 25

-8

8

4

-4

Solve the equation for y: 9y + 12 = -6

9

-2

-9

2

Solve the equation for x: -16 - 12x = 32

4

-3

3

-4

Solve the equation for b: -4b + 18 = -6

-3

3

-6

6

Solve the equation for y: -3y - 2 = 10

-4

4

3

-3

1) 8

Step-by-step explanation:

4k-7=25

add +7

4k-7+7=25+7

4k=32

divide by 4

4k÷4=32÷4

K=8

2) -2

9y+12=-6

add -12

9y+12-12=-6-12

9y=-18

divide by 9

9y÷9=-18÷9

Y=-2

3) -4

-16-12x=32

add +16

-16+16-12x=32+16

-12x=48

divide by -12

-12x÷(-12)=48÷(-12)

X=-4

4) 6

-4b+18=-6

add -18

-4b+18-18=-6-18

-4b=-24

divide by -4

-4b÷(-4)=-24÷(-4)

b=6

5) -4

-3y-2=10

add +2

-3y-2+2=10+2

-3y=12

divide by -3

-3y÷(-3)=12÷(-3)

Y=-4

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

oof cheaters cheat because they’re lazy that’s why i cheat xd

: )

step-by-step explanation: