## anonymous one year ago ok doing the quadratic formula i need to know how to solve for t 20=-16t^2+30t+4 don't want the answer just want to know how to solve

1. anonymous

18,1.153253

2. anonymous

can someone please tell me how to solve for t? :(

3. anonymous

thank you for the answer but i have to show my work i just need to know what steps to take

4. amistre64

5. anonymous

h=-16t^2+vt+s

6. amistre64

7. amistre64

given the quadratic equation: ax^2 + bx + c = 0 the roots of the equation, the solution for the x values are: $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

8. anonymous

ok but how do i solve? this

9. amistre64

20 = -16t^2+30t+4 id first make it equal to 0, then define your values for a,b, and c

10. anonymous

ok but i have to find t i dont want the answer i just want to know how to do it myself

11. amistre64

then work the process, make the equation equal to 0 to start with

12. anonymous

-16t^2+30t+(4-20)=0 A = -16 B = 30 C= -16 plug into formula shown above and solve.

13. amistre64

we could divide it all by 16 as well and get the same results :) but thats just a side note

14. anonymous

ok thank you both for the help