Here's the question you clicked on:
hal_stirrup
y=-2375x+18000 at what value of x would y be less than 1400.
is that 14000 or r u sure about 1400.
Set y as 1400 and solve for x 1400=-2375x+18000 2375x=16600 x=7 Since the slope is negative, x has to be greater than 7 (if you draw the graph you will see)
When will be y = 1400 ? first of all , let y =1400 1400 = -2375x + 18000 1400 - 18000 = -2375 x x = -6.98 so at x = -6.98 (approx. => x = -7) y will be 1400
May be I am wrong .. satellite73 may correct me
You could also arbitrarily plug in points greater or less than 7 and less than 7 to check the solution
I meant x = 6.98 there
mathslover, the answer would round up anyways, even at 2 significant digits. anyways i already posted the solution
my text book gives x=8