Apply the Pyth. Theorem:
c^2 = 3^2 + 7^2, or c^2 = 9 + 49 = 58. Thus, c = sqrt(58).
Answer:
A,d,e not sur tho
Step-by-step explanation:
A rational expression is undefined when the denominator is zero.

is undefined when x=0 or x=2.
Answer:
57.4
Step-by-step explanation:
82.4 - 25 is too easy, a calculator can solve this.
Answer:
5.2%.
Step-by-step explanation:
After 1 hour (60 / 100) * 700 = 420 gallons of beer have been exchanged.
So we have 420 gallons of 6% and 280 gallons of 4% after 1 hour.
So the strength at that time = (420* 6) + 280*4) / 700
= 5.2%.