Which is equivalent to the expression below? +8.7x- + PLEASE HELP ASAP

a.9.2x+0.5
b.9.2x-0.5
c.13.7x+0.5
d.13.7x-0.5

a) 9.2x + 0.5

Step-by-step explanation:

combine 'like terms':

2/3 - 1/6 = 4/6 - 1/6 which is 3/6 or 1/2 or 0.5 as a decimal

8.7x + 0.5x = 9.2x

 9.2x + 0.5

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

18.8cm hope i at all

step-by-step explanation: