Question

PRE CALC PLEASE HELP!!!
Applications of Parametric Equations
PICTURE ATTACHED

Answer 1

@.Sam. @amistre64 @Callisto @hartnn @jim_thompson5910 @Mertsj

Answer 2

More like substitution...

Answer 3

x=3t, y= t+7

from x=3t
t=x/3

y= t+7
\[y=\frac{ x}{3}+7\]

Answer 4

1. y=x/3+7

Answer 5

ohh ok gotcha, thank you! :) what about the second one

Answer 6

Same thing for second one

Answer 7

can you show me?

Answer 8

@.Sam.

Answer 9

2. y=3x^2+7

Answer 10

thank you @Jfcarlucci can i ask this last one?

Answer 11

@Jfcarlucci

Answer 12

sorry sammy- trying to work it out now using mathway.com. Great resource for problems like these, but sometimes they say it can't be solved....

Answer 13

ok, let me know if you figure it out :)

Answer 14

still saying it can't be solved for some reason... probably bc of the inequality.
You can give it a shot if you want http://www.mathway.com/problem.aspx?p=precalculus?p=xSMB01tSMB072+3,ySMB01tSMB072-2?p=175?p=error

Answer 15

ok what about this one...


Eliminate the parameter.

x = 4 cos t, y = 4 sin t


@Jfcarlucci

Answer 16

sammy, youve asked 3 questions that all amount to the same process - and Sam gave you a process. What part of this is giving you trouble?

Answer 17

given a function x(t), rewrite "t" as a function of x: t(x), this is just relating inverses

now, given that y is a function of t: y(t) = f(t), and we know t is a function of x ... rewrite y as:

y(x) = f(t(x))