Ajar contains 54 pennies, and 2/3 of the coins in the jar are pennies. how many coins are there?

81

Step-by-step explanation:

since 54 is 2/3 of the jar then you divide 54 in half which then gives you 27 and you add that to 54 then your final answer is 81

:) hope that helps

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.