Andrew has a cellphone plan that provides 300 free minutes each month for a flat rate of $19.for any minutes over 300,andrew is charged $0.9 per minute. which of the following piecewise functions represents changes based on andrews cellphone plan? (a) f(x)=19,x> 300 over 19+39x, x300 (c) f(x)=19,x< =300 over 19+39(x-300),x> 300 (d) fx= 19,x< =300 over 39x, x> 300

i'm pretty sure it's 477,585,296, but perhaps my math is incorrect.

option a, c,d are correct.

step-by-step explanation:

from the given figure, it is given that z is equidistant from the sides of the triangle rst, then from triangle tzb and triangle szb, we have

tz=sz(given)

bz=zb(common)

therefore, by rhs rule,δtzb ≅δszb

by cpctc, sz≅tz

also, from δctz and δasz,

tz=sz(given)

∠tcz=∠saz(90°)

by rhs rule, δctz ≅ δasz, therefore by cpctc, ∠ctz≅∠asz

also,from δasz and δzsb,

zs=sz(common)

∠zbs=∠saz=90°

by rhs rule, δasz ≅δzsb, therefore, by cpctc, ∠asz≅∠zsb

hence, option a, c,d are correct.

i cant see the graph

step-by-step explanation: