can you solve and explain 1-4

1. 3x - 3y = 9  

to find the x or y intercept, multiply the other variable that you are not tryng to find by 0  

3x - 3(0) = 9             3(0) - 3y = 9

3x = 9                       -3y = 9

3x/3 = 9/3                 -3y/-3 = 9/-3

x = 3                           y = -3

2. I did the same thing for the rest

x = 6     y = -2

3.   x = 2.5     y = -5

4.  x = -4  y = -2/3

76%

step-by-step explanation:

24% are dogs and the remaining is 76% because 100-24=76

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752