The price of a share of a company is $20 before the trading open on Monday. The price rises 10% on Monday and falls 10% on Tuesday. The share price at the end of Tuesday is $

Step-by-step explanation:

Price rise on Monday will be 110/100×$20

=$22

Price fall on Tuesday will be

90/100×$20

=$18

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