Solving systems of equations using substitution. Y= 2x8. Y= 5-x

1. perpendicular

2. parallel

3. perpendicular

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

step-by-step explanation:

x- intercept ( 0,12)  

y-intercept (-6,0)