Answer:
b
Step-by-step explanation:
Null hypothesis: mean of valence for all metal song is equal to mean of valence of blues song.
Null hypthesis tests the claim
Altenate hypothesis: mean of valence for all metal songs is not equal to mean of valence of blues song.
Alternate hypothesis rejects the claim.
The answer is number A: â12 or x = 2
Answer:
x=-6 and y=-3
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Step-by-step explanation:
Step: Solve−3x+y=15 for y:
−3x+y=15
−3x+y+3x=15+3x (Add 3x to both sides)
y=3x+15
Substitute 3x+15 for y in−3x+7y=−3:
−3x+7y=−3
−3x+7(3x+15)=−3
18x+105=−3(Simplify both sides of the equation)
18x+105+−105=−3+−105 (Add -105 to both sides)
18x=−108 divide both side by 18
x=-6
Answer:
irrational
Step-by-step explanation:
= · which is the same as 3
3 divided by 3 equals , which is irrational