Which of the following is the standard form
of the polynomial function y = x(x + 5)(x − 3)?

y = x2 + 2x − 15
y = x3 − 8x2 − 15x
y = x2 − 8x − 15
y = x3 + 2x2 − 15x

y = x³ + 2x² - 15x

Step-by-step explanation:

Given

x(x + 5)(x - 3) ← expand the second pair of factors using FOIL

= x(x² - 3x + 5x - 15)

= x(x² + 2x - 15) ← distribute the parenthesis by x

= x³ + 2x² - 15x

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.