Answer: 3
Step-by-step explanation:
Let E be the event of that student pierces ear and N be the event of that student pierces nose.
Given: 

For any two event A and B, we have

Similarly , 

Hence, 3 students have piercings both on their ears and their noses.
Answer:
Root of 2048. [Root of two thousand forty-eight] . square root. 45.2548. cube root. 12.6992. fourth root. 6.7272. fifth root. 4.5948.

remember
(ab)/(cd)=a/c times b/d
also

split it up with like terms

times

do subtraction
for a's
12-2=10
b's
8-4=4
answe is

first one
17 by 17
Its all to do with square numbers so 17 x 17 = 289.
Just square root it and you get 17
9514 1404 393
Answer:
e. no solution
Step-by-step explanation:
You would be looking for factors of +5 that have a sum of -4. There are none (no solution). None of the values offered in the answer choices have a product of +5.
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The discriminant of the quadratic is (-4)² -4(1)(5) = -4, so the roots are complex.