Please help me its about solving system by substitution

(4,3)

Step-by-step explanation: you have to substitute y+1 for x in x+2y=10 and then you’ll get 3 for your answer when you work it out and now put 3 in the place for y in x=y+1 because you just solved for y and you should get 4 as your answer for x giving you x=4 and y=3

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

depends on how many days you are talking about

step-by-step explanation: