Me my last day to turn this in! marking brainliest solving systems of equations by elimination 3) 7x + 3y= 22 4y= 20 4) -2x + y= 10 4x - y= -14

3)

4)

Step-by-step explanation:

3) For this system of equation you already has one variable in the second equation. Therefore, you only need to solve for in the second one and substitute its value into the first equation to calculate :

4) You must add both equations to cancel the variable and solve for . Then, susbstiute the value of this variable into one of the original equations to calculate :

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i