Which equation has exactly ONE solution? A) 3 + 10x 2 = 4x + 2 B) 15x − 5 3 = 5x + 4 C) 2 + 6x 2 = 3x + 1 D) 4x − 10 2 = 2x − 5

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step-by-step explanation:

tyty jry j y yj yttj yhgtyj y ghyj ytthj

8

step-by-step explanation:

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