1)when we know x+y=90* the sine of x is equal to cosine of y , so the solution of the first is 0.6 again!
Answer:
$75
Step-by-step explanation:
$x @ 4%, $x/3 @ 5% , $(10,000- 4x/3) @ 9%
<span>.04x +.05x/3 + .09(10000 - 4x/3) = 729 </span>
<span>4x + 5x/3 + 9(10000 - 4x/3) = 72900 </span>
<span>19x/3 = 17100, x = 2700 </span>
<span>------------------ </span>
<span>$2700 @ 4% </span>
<span>$900 @ 5% </span>
<span>$6400 @9% </span>
Answer:
Decreased by 40%!
Step-by-step explanation:
At first it goes down by 10%, then 30%, so you just add them together and get decreased by 40%.
