Solve the equation shown below for x. Round your answer to the nearest thousandth:

A. -3.678
B. 1.921
C. -1.079
D. 4.921

Question

Solve the equation shown below for x. Round your answer to the nearest thousandth:

 A.	-3.678
 B.	1.921
 C.	-1.079
 D.	4.921

anonymous · Answer

attachment

anonymous · Answer

i think its D

tkhunny · Answer

Almost by inspection: $5^{x+3} = 22$.  This makes 1 < x+3 < 2 or -2 < x < -1.  If we have to, definitely leaning toward the -1 side, -2 << x < -1.

Looks like only one candidate.  It's no tD.

anonymous · Answer

-1.079 is in between that range :)

tkhunny · Answer

That's all there is to it.  If this is a timed test, you just saved a lot of time!

anonymous · Answer

Thanks:)  @tkhunny  and ps it is

anonymous · Answer

Are you good at matrix equations its my last question and its hard can you help me please

tkhunny · Answer

More exact: -1.0794273395216288765306916512521

tkhunny · Answer

Post and tag on another thread.

anonymous · Answer

ok thanks!