Everyday jin reads for 0.75 hours in the mornings and 1.25 hours in the evening. he uses the expression 0.75d + 1.24d to keep track of the number of hours he has read for any number of days, d. if jim reads for 20 days, how many hours has he read?

answer. overdue

Step-by-step explanation:

0.75d + 1.25dfor 20 days

0.75(20) + 1.25(20) = 15 + 25 = 40 hrs <===

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