A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
im lost ... −16t2+80x−60=0
Solving for t,
t=(5±10−−√)2
anonymous
 4 years ago
im lost ... −16t2+80x−60=0 Solving for t, t=(5±10−−√)2

This Question is Closed

lgbasallote
 4 years ago
Best ResponseYou've already chosen the best response.0why do you have mixed variables __

campbell_st
 4 years ago
Best ResponseYou've already chosen the best response.0well simplify the problem 4(4t^2  20t +15)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Ah this is the a nswer i gave you earlier for the height?

campbell_st
 4 years ago
Best ResponseYou've already chosen the best response.0so using the GQF \[t = (20\pm \sqrt{(20)^24\times4\times15})/(2 \times4)\] \[t = (20 \pm \sqrt{16 \times10})/8 = (5\pm \sqrt{10})/2\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0umm yeah im already there

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Screw it the equation th ing is broken

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Use the quadratic formula to s olve for t

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[t=\frac{b \pm \sqrt{b^24ac}}{2a}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I dont think ive learned that yet

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Is this a physics problem or calculus?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0You should've learned the quadratic formula back in algebra

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so i would just plug in the numbers that were found in the early part of the question?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[ax^2+bx+c=0\], you can only use the quadratic formula when you have your equation like this

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0in this case you do, and you can also divide out a 4 from all the terms 16,80, and 60

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[4t^2+20x15=0\] a=4 b=20 c=15

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok? so now I can solve by getting

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0no, use the quadratic formula as it is written above right now, \[t=\frac{b \pm \sqrt{b^24ac}}{2a}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[t=\frac{20 \pm \sqrt{20^24(4)(15)}}{2(4)}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[t=\frac{20 \pm \sqrt{160}}{8}=\frac{20 \pm 4\sqrt{10}}{8}=\frac{5 \pm \sqrt{10}}{2}=\frac{5 \pm \sqrt{10}}{2}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Remember to keep the positive and negative signs for a,b,c

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so now I have 3.16227766/2 = 1.58113883

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[t \approx .9189s, t \approx 4.081s\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0can you give me the all the numbers shown on your calculator

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0They are irrational numbers, there are infinitely many decimal places

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Use the answer with the square root

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0no just the numbers shown on your calculator bcause I need the precise number

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0You can't get a precise number from an irrational number! Use \[t=\frac{5 \pm \sqrt{10}}{2} s\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0That is the precise answer, any decimal answer is an approximation

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0what I mean is when plug the answers into the my computer it needs the closets thing to an approximate number

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so it must have the all the numbers shown from the calculator for it to be correct

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Your calculator can show hundreds of digits if you want it to

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0How many decimal places do you need?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[t \approx 0.918861169916s, t \approx 4.08113883008s\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0like im using a standard calcultor so it only shows like 9 or 10 numbers

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0here are my instructions : For example, the fraction 2/3 is exact, while the decimals 0.67, 0.666666667 and 0.666666666666666666667 are all approximate values for 2/3. Where an exact answer is called for, an approximate answer will be marked wrong.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0So if you use a decimal here, you will be wrong

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Use the answer i gave you with the square root

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so like t t= .9189 just sqrt it

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[t=\frac{5+\sqrt{10}}{2}, t=\frac{5\sqrt{10}}{2}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Those are the exact answers for the time

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok got it , thanks sorry for the confusion !!
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.