mworkhard222

u mean 2 factors? 
prime numbers have 2 factors, 1 and itself like 23

the solution is: -9/2 < t ≤ 9/4

so the interval is: $(-\frac{9}{2},\:\frac{9}{4}]$

it simplifies to $10x^2-16x+51$

Not that hard,

$a=2-9a$

$=10a=2$

$=a=\frac{1}{5}$

C

tysm!!!
i know the answers but.. still

edit: forgot to mention that #4 and #5 is wrong :(
        i won't tell you the answer just in case someone else answers but....

ok.
 

2/5 were blue so that means 3/5 is left.
1/2 of 3/5 = 3/10 so 3/10 of them are red

which also means 3/10 of them were white.
if x was the # of t-shirts, then

$\frac{3}{10}x=9$

$3x=90$

$x=30$

we can check this by doing 2/5 * 30 = 12
3/10 * 30 = 9
and white = 9
$12+9+9=30$

Oh ok, not that hard.
$3^{11}+5^7+1=255273$

It's divisible by 3 because:
$2+5+5+2+7+3=24$

and 24 is divisible by 3.

So the answer is $\boxed{3}.$

i think he/she knows that, it's just for a joke purpose

$x\le \frac{17}{3}$