Estimate 17.89 – 11.14 by rounding before you add or subtract. about 6 about 7 about 9 about 8

About 7 would be the correct answer because 17.89 rounded would be 18 and 11.14 rounded would be 11. 18 - 11 = 7

About 7

Step-by-step explanation:

17.89 is rounded to 18, 11.14 is rounded to 11.

18-11=7

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