If the system x+y=5, 5x+by=19 has a solution represented by the ordered pair (-1,6) then the value B is

40

Step-by-step explanation:

the awnser is 40

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 answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.