A new computer workstation costs $7,000. Its useful lifetime is 5 years, at which time it will be worth an estimated $3,000. The company calculates its depreciation using the linear decline method that is an option in U.S. tax law. (a) Find the linear equ

 I will be able to see wether the answers are correct or not immediately on webassign, so just retyp

  1-Use the quadratic formula to find any x-intercepts of the parabola. (If an answer does not exist, enter DNE.)

y = 2x2 − 10x + 5

( x,y)=  for smaller x value

( x,y) = for larger x value

2-A new computer workstation costs $7,000. Its useful lifetime is 5 years, at which time it will be worth an estimated $3,000. The company calculates its depreciation using the linear decline method that is an option in U.S. tax law.

(a)    Find the linear equation that expresses the value V of the equipment as a function of time t, in years, for 0 ≤ t ≤ 5.

3-Find an equation of the circle with center

(3, 1) that passes through (−2, 3)

4- Factor the quadratic equation.

x2 + 9x + 20   note: I already enter this answer :  (x+4)( x+5)  but the system responded incorrect.