Use the substitution method to solve the system of equations. Choose the correct ordered pair. 14x - 2y = 78 2x - 2y = 6

(6, 3)

Step-by-step explanation:

Step 1: Rearrange 2nd equation

2x = 2y + 6

x = y + 3

Step 2: Substitution

14(y + 3) - 2y = 78

14y + 42 - 2y = 78

12y + 42 = 78

12y = 36

y = 3

Step 3: Plug in y to find x

2x - 2(3) = 6

2x - 6 = 6

2x = 12

x = 6

Solution,

Putting the value of x from equation (i)

Now, putting the value of y in equation (i)

Value of X is 6

Value of y is 3

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Good luck on your assignment...

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.

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two