A system of equations is shown below. Which of the following replacements can be made to produce the same (xy) solution?
23-y=4
3r + 2y = 1
A Replace 2x - y = 4 with 8x - 4y = 4
B Replace 3x + 2y = 1 with 5x + y = 5.
Replace 3x + 2y = 1 with 6x + 2y = 2.
D Replace 2x - y = 4 with 3x + 2y = 1

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

Find the value of ax 4 ; a = 2, x = 1. select one: a. 2 b. 4 c. 1 d. 8

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.