i need some help
2006-11-26 17:15:22 · 4 answers · asked by jjenk32 1 in Science & Mathematics ➔ Mathematics
Thanks That is what i needed
2006-11-26 17:46:18 · update #1
logb(x) = y is the same as b^y = x
so log2(2x + 9) = 4 means
2^4 = 2x + 9
16 = 2x + 9
2x = 7
x = 7/2
2006-11-26 17:18:14 · answer #1 · answered by beekay36 2 · 0⤊ 0⤋
You first write the equation in a exponential form.
log2(2x + 9) = 4 is equivalent to 2x + 9 = 2^4 = 16
So 2x + 9 = 16 <=> 2x = 16 - 9 = 7 <=> x = 7/2
2006-11-27 01:31:09 · answer #2 · answered by Joseph Binette 3 · 0⤊ 0⤋
put it in exponential form; 10^4=2(2x+9)
then expand 10^4=4x+18
subtract 18 9982=4X
DIVIDE by 4 x=2495.5
2006-11-27 01:19:35 · answer #3 · answered by che_karlos 2 · 0⤊ 0⤋
is it in base 2 or in base 10
if it is base 2 then the first guy is right
if base 10, second buy is right
2006-11-27 01:24:59 · answer #4 · answered by team rape 2 · 0⤊ 0⤋