Suppose that x = 2+2t and y = t - 21. If x = 8, what is y?

Question

asked Apr 28, 2021 42.1k views

1 Answer

AngleUr · Answer 1 · 2021-05-03T04:59:15+0000

Answer:

y=-18

Explanation:

So we know that:

$x=2+2t\text{ and}\\y=t-21$

And we want to figure out the value of y when x is 8.

So first, substitute 8 into the first equation:

8=2+2t

Solve for t. Subtract 2 from both sides:

6=2t

Divide both sides by 2:

t=3

Now, substitute this into the second equation for t:

y=(3)-21

Subtract:

y=-18

So, the value of y is -18.

And we're done!