In the following equations, what would you multiply the second equation to eliminate the "y"? *(PLEASE I REALLY NEED HELP!!D:)

3x + y = 20
x + y = 12

1) -1

2) 1

3) -3

4) 3

Awall map has a scale of 128 miles = 6 inches. the distance between springfield and lakeview is 2 feet on the map. what is the actual distance between springfield and lakeview? 384 miles 512 miles 1.13 miles 42.7 miles

15/16 as a decimal rounded to the nearest hundredth

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution