Mark bought 8 boxes a wekk later half of all his boxes were destroyed in a fire there are now only 20 boxes left with how many did he start with show work

32

Step-by-step explanation:

First of all, it is an equation.

1/2(b+8)=20

1/2b+4=20

1/2b=16

b=32

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

the reporter's right

step-by-step explanation:

1/4 = .25 / 25%