Answer:
31.
Step-by-step explanation:
5+5 = 10 + 1 = 11
12 + 12 = 24 +1 = 25
15 + 15 = 30 + 1 = 31
I don't know I tried to see if that was the pattern. It checks out math wise.
Answer and Step-by-step explanation:

Step-by-step explanation:
The result is 12 cm³ because to get the volume of a figure you have to multiply all the characters
Mary has 48 stickers. The ratio is 4:7
divide 48 with 4
48/4 = 12
Multiply 12 with 7
12 x 7 = 84
Mary buys another 8 stickers: 48 + 8 = 56
56:84 is the new ratio
hope this helps