Joey "goodfella" branzolli liked to shuffle music as a disk jockey. he had 80 cds, which were rock and rap cds. he bought his cds at a bulk rate: $4 for rock and $3 for rap cds. if his collection was worth $292, how many of each type of cd did he own?

there has to be 52 rock (4 each) which equals to 208, and 28 rap (3 each) which equals to 84, and 84 + 208 = $292

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