Answer:
66
Step-by-step explanation:
12(8)-9(8-6)-(12-9)(8)÷2=96-18-12 or 6(9)+(12-9)(8)/2=54+12
= 66 =66
Answer:

Step-by-step explanation:
Answer:
x = 5
Step-by-step explanation:
Applying Pythagoras' identity to the right triangle
x² + 12² = 13²
x² + 144 = 169 ( subtract 144 from both sides )
x² = 25 ( take the square root of both sides )
x =
= 5
Step-by-step explanation:
factor out x because that variable is common in all 3 terms
x (x2 - x - 12)
now you can factor
x (x-4) (x+3)
when you use FOIL you will see you arrive at the original answer.
so yes it is a factor
7.8 = 0.65x
x = 100/65 * 78/10
x = 10/5 * 6
x = 12