Store a is selling a video for 20% off the store’s regular price of $25.95. store b is selling the same video for 30% off the store’s regular price of $29.50. which store’s sale price is lower and by how much lower is the price? a. store a; $3.66 lower c. store b; $3.66 lower b. store a; $0.11 lower d. store b; $0.11 lower

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²