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leahphi
14.06.2020 •
Mathematics
(20 points + brainliest) PLEASE HELP! LOVE YALL THX SO MUCH! If x+y−z=8 and x−y+z=12, then x= (A) 2 (B) 4 (C) 10 (D) 20 (E) It cannot be determined from the information given
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Ответ:
i think e because we do not know the y or z values
Step-by-step explanation:
Ответ:
C
Step-by-step explanation:
x +y -z= 8 (1)
x -y +z= 12 (2)
Adding equations 1 and 2 together,
x +y -z +x -y +z= 8 +12
Grouping like terms together,
x +x +y -y -z +z =20
2x= 20 (simplify)
x= 20 ÷2 (÷2 on both sides)
x= 10
Ответ:
They are dependent events. Event A is choosing one musician while Event B is choosing another musician. THey are ALL musicians, no matter what instrument they play, we just know that there are 7 musicians in total. Therefore, the events are dependent because after choosing one musician, you would have 6 musicians left, instead of 7.
Step-by-step explanation: