Answer:
x=-2
Step-by-step explanation:
K value = natural log (.5) / half-life
half-life = natural log (.5) / k value
half-life = -.693147 / 0.1011
half-life =
<span>
<span>
<span>
6.8560534125
</span>
</span>
</span>
I'd say the k value should be negative AND it should have units.
50-6x=y
since each car wash is 6 dollars and you do not know the number of cars washed it is 6x
50-6x is because you need to find out how much is left in the card so you subtract the total from how much she spent
Two lines and a point are guaranteed to be coplanar if the two lines share only a single point.
Hope this helped :)
