Cho hàm số ()yf x=có bảng xét dấu của ()fxnhư sau:Hàm số đã cho nghịch biến trên khoảng nào sau đây?A.()1; 3 .B.();1 .−C.();.− +D.()3

answer: 42

use a calculator to find that 845/73 = 11.575

the whole part of the answer is 11. multiply this by 73 to get 11*73 = 803.

subtract that result from 845 to get 845 - 803 = 42

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

you can't solve x because it is 2 linear equation and you only have one equation

answer: you need the equation in the question so i can answer it

step-by-step explanation: