2. Which statement is true? A. The pair of equations y = 6 and y = 3x + 6 has no solution.

B. The pair of equations x + y = 1 and -x - y = -1 has the solution (0, 0)

C. The pair of equations 2x + 2y = 4 and x + y = 2 has no solution.

D. The pair of equations 7y = 14x and y = 2x has infinitely many solutions.

D-The pair of equations 7y = 14x and y = 2x has infinitely many solutions.

Step-by-step explanation:

The first one is wrong, because they do have a solution: (0,6).

The second one is wrong, because it does not have a solution.

The third one is wrong, because it has infinitely many solutions.

The last one is right, because it has infinitely many solutions.

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

a

step-by-step explanation: