15, because 3 goes into 9, 3 times and, 4 goes into 12, 3 times therefore x has to follow this rule because these 2 triangles are similar and because it already gives you 5 just take 5*3=15 there is your answer enjoy!=)
Answer:
4 x 5
Step-by-step explanation:
Is it 25 cm???????.................
Answer:
D. 
Step-by-step explanation:
Consider the set
This set consists of four ordered pairs.
The first numbers in these pairs are 
These numbers are integer numbers (not natural, because -3 is negative).
The second numbers in these pairs are 
These numbers are integer numbers too (not natural, because -2 is negative).
Options contain only natural and real sets, so, the first and the second numbers are real numbers and
