Double my tens digit to get my ones digit and double me and i am less than 50?
12,24
Hope I helped, good luck!
Answer:

13 glue sticks cost $25.22.
Step-by-step explanation:
4 blue sticks cost $7.76, this means that one glue stick costs
$7.76/4 = $1.94.
Let
be the cost of the glue sticks, and
be the number of glue sticks; then

We can use this equation to find the cost of 13 glue sticks; we just put
into our equation and it gives:

So 13 glue sticks cost $25.22.
I think it 0.64 because if you think about it 6 marble in the pouch won’t be enough for 2.5 gram of vintage glass so instead try to put in and see how much it fit. 3.14 - 2.6 = 0.64