Answer:
Step-by-step explanation:
Just plug in 20 for t:

Answer:
(2x-1)(2x+1)
Step-by-step explanation:
the answer is c
Answer:
$0.19
Step-by-step explanation:

Step-by-step explanation:
The Standard Form of the equation of line is given by:

So:

The x-intercept can be found setting
:

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Answer:
80%
Step-by-step explanation:
Denise used 360 minutes out of 450 minutes. You would set this up as a fraction. Then, you would have to find out the percentage of how much Denise used. You would put 360/450 across from x/100. You find the value of x by multiplying 360*100 which equals 36000. You then would divide it by 450 to get a product of 80. This is how you would get 80%.