Eric has 240 coins in his collection.11/20 of the coins are pennies.4/20 of the coins are nickels. the rest of the coins are quarters. how many of you the coins are quarters?

Step-by-step explanation:

240/20 = 12

Denominator = 240

11/20 = both numerator and denominator multiplied by 12 = 121/240

4/20 = both sides multiplied by 20 = 80/240

121 + 80 = 201

240 - 201 = 39 quarters in collection

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17

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.