Help please D: i will mark brainliest if its right

Step-by-step explanation:

After 7 weeks from now you will have $185 in your bank account.

first, it's not possible to leave answer in whole number. it's going to be in mixed fraction

ans is 4 11/16

Step-by-step explanation:

let the total amount be B and week be W

from equation b=70+(10+6)w

$145=70+16w

$145-$70=16w

$75=16w

75/16=16w/16

so, w= 75/16

4 11/16 or 4.7 rounding up to 1d.p

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