Substraction is a comutative operation
x + 3x + 4 = 72
4x + 4 = 72
4x = 68
x = 68 / 4
x = 17.
Answer: 3A^4 + 13A^2B - A^2C - 22BC - 10B^2 - 4C^2
Answer: Option 'D' is correct.
Step-by-step explanation:
Since we have given that

and

So, we need to find,

(∵they are independent events .)

So, option 'D' is correct.
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Answer:
ΔLMN ~ ΔLFG; scale factor 7/3
Step-by-step explanation:
The ratios of side lengths, shortest to longest are ...
FG : GL : LF = 24 : 36 : 42 = 4 : 6 : 7 (reduced)
MN : NL : LM = 56 : 84 : 98 = 4 : 6 : 7 (reduced)
The side ratios are the same, so ΔLMN ~ ΔLFG. The scale factor is ...
MN/FG = 56/24 = 7/3