Solve the equation for x, accurate to three decimal places: 400 + 10x = 6,429.
a) x = 3.780
b) x = 0.870
c) x = 3.808
d) x = 0.877

Question

Solve the equation for x, accurate to three decimal places: 400 + 10x = 6,429.
a) x = 3.780
b) x = 0.870
c) x = 3.808
d) x = 0.877

anonymous · Answer

alright so first of all, you have to make 10x the subject of the formula, to do that, you need to subtract 400 from both sides, 
so now you get 10x=6429 -400 
which is 10x=6029
but what I dont understand is that the answer would be none of the options, are you sure that you wrote the question correctly?

anonymous · Answer

Yeah , i wrote it right. You see I'm taking a pretest on this computer class, so it gives me the questions even if they don't make sense. It's troublesome but normally it's the closest to the actual answer.

anonymous · Answer

hmm well the answer would 6029/10 which is pretty far off from all of those answers :/

anonymous · Answer

Yeah, I noticed. Well I'll hope for the best. At least I know how to solve it now so thank you.

anonymous · Answer

np :)