What is the measure of angle b?

Step-by-step explanation:

We know: The sum of measures of angles in a triangle is equal to 180°.

Therefore we have the equation:

b° + 80° + 40° = 180°     combine like terms

b° + 120° = 180°           subtract 120° from both sides

b° + 120° - 120° = 180° - 120°

b° = 60°

60 degrees

Step-by-step explanation:

all triangles have angles making 180 degrees. so 80+40=120

180-120=60

function 2 has a greater rate of change than function 1

function 2 has a greater y-intercept than function 1

step-by-step explanation:

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.