If x varies inversely as t, and x = 8 when t = 6, find t when x = 12- =
1 answer:
Answer:
t = 4
Step-by-step explanation:
given x varies inversely as t , then the equation relating them is
x = ← k is the constant of variation
To find k use the condition x = 8 when t = 6 , then
8 = ( multiply both sides by 6 )
48 = k
x = ← equation of variation
when x = 12 , then
12 = ( multiply both sides by t )
12t = 48 ( divide both sides by 12 )
t = 4
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-2<1 ==> f(x)=3x²-1 =>f(-2)=3*(-2)²-1=3*4-1=12-1=11
-2<1 ==> f(x)=3x²-1 =>f(-2)=3*(-2)²-1=3*4-1=12-1=11
Answer:
Step-by-step explanation:
rewrite as multiplication
look to factor
, difference of 2 squares and perfect square
, finish factoring and simplify
2(x+3)