Add the equations. 5x - y = - 1 +-5x + 3y = 25

C. 2y = 24

Step-by-step explanation:

The sum of x-terms is 5x + (-5x) = x(5 -5) = 0.

The sum of y-terms is -y +3y = y(-1+3) = 2y.

The sum of the constant terms is -1 +25 = 24.

The result is ...

... 2y = 24

C

Add the like terms from both equations on both sides

(5x - 5x ) + (- y + 3y ) = - 1 + 25

0 + 2y = 24

2y = 24 → C

1/800 is the right answer

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.