While on vacation, Rosa stopped at a souvenir shop to buy keychains and refrigerator magnets for family members and
friends. Keychains cost $2 each, and refrigerator magnets cost $1
each. Let x represent the number of keychains that Rosa bought,
and let y represent the number of refrigerator magnets.
Rosa bought 12 items and paid $18 more for the keychains than
for the refrigerator magnets.

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Step-by-step explanation:

We assume you want to know how many of each item Rosa bought.

The problem information lets us write two equations:

  x + y = 12

  2x - y = 18

Adding the two equations, we get ...

  3x = 30

  x = 10 . . . . . divide by 3

  y = 12 -x = 2 . . . find y

Rosa bought 10 keychains and 2 magnets.

he will have 300 because he is really broke and 300 is in his imangine

step-by-step explanation: he ehe heh step by the thy

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.