on triangle abc
a f is bisector, a, b,f, e dots are on same circle.
angle aef= 2* angle c
bf=4
ec=?

EC=4

Step-by-step explanation:

P=Q

BF=FE=4

∠AEF = 2 ∠ECF

∠AEF = ∠EFC + ∠ECF =2x

∴ ∠EFC = ∠ECF =x

∴FE = EC=4

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.