X=23
I say this because you can see that the scale factor is 3 due to just visually scaling both the long and short leg from the original triangle to the dilated triangle. Dividing 39 by 3 is 13, and doing it in reverse. Adding 10 would equal 23, the initial value. So that'd be the missing value.
Answer:

Step-by-step explanation:
Probability: 

Answer:
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Step-by-step explanation:
Answer:
1) The polynomial
represents a sum of cubes
2) The polynomial
represents a difference of squares
Step-by-step explanation:
1) To find the polynomials represents a sum of cubes :
represents a sum of cubes
For


Therefore
Therefore
represents a sum of cubes
2)To find the polynomials represents a difference of squares :
represents a difference of squares
For 


Therefore 
Therefore
represents a difference of squares
Answer:
8
xy
5
−
16
x
2
y
3
+
20
x
4
y
4
Step-by-step explanation: