Irma needs to buy 8 1/4 feet of packaging tape. There are 2 3/4 feet of tape on each roll. How many rolls of tape should Irma buy?

3 rolls of tape

Step-by-step explanation:

1. Make an equation:

2 3/4x=8 1/4; x=number of rolls of tape

2. Divide both sides by 2 3/4 to isolate x:

x=8 1/4 divided by 2 3/4

3. Simplify:

x=3

Have a nice day! :D

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.