A cell phone company offers two texting plans to its customers. The monthly cost, y dollars, of plan A is y = 0.19x + 6, where x is the number of texts. The cost of plan B is shown in the table. Drag and drop the
correct option into the box to make the statement true.
100
Number of texts, X
Cost (S), y
200
39
300
48
400
57
500
30
66
Which plan is cheaper for under 150 texts?
For under 150 texts,
plan B is cheaper
plan A is cheaper
the plans cost the same amount

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.