Answer:
x=49
Step-by-step explanation:
los 3 angulos del triangulo deben de sumar 180
76+55=131
180-131=49
76+55+49=180
I believe it would just be -1
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:
1282.81824016
Step-by-step explanation:
Find the volume of the cone (the formula is π×r²×h/3) and the volume is 359.19
Now find the volume of the cylinder which is 923.6282401554 and we just add them together which is 1282.81824016