solve for x... 15=-4+5logx?

2 ⤊

2007-12-26 18:08:40 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

19 = 5 log x
log x = 19 / 5
log x = 3.8
Take log as being log to base ten:-
x = 10^(3.8)
x = 6310 (to nearest whole number)

2007-12-26 21:02:34 · answer #1 · answered by Como 7 · 2⤊ 0⤋

5logx = 15 + 4
5logx = 19
logx = 19/5 = 3.8
x = 10^3.8
x = 6309.6

2007-12-27 03:55:10 · answer #2 · answered by fraukka 3 · 0⤊ 0⤋

15 = -4 + 5logx
19 = log (x^5)
10^19 = x^5
10^(19/5) = x
x = approx. 6309.573445

2007-12-27 02:14:48 · answer #3 · answered by Jacob A 5 · 0⤊ 0⤋

5*(log x) - 4 = 15

log x^5 = 19

10^19 = x^5

x = (10)^19/5 or 6.309,57344

FCH.

2007-12-27 02:13:16 · answer #4 · answered by Dr. Milk 4 · 0⤊ 1⤋