Write an equation that represents the line use exact numbers

y = 2/3x +4/3

Step-by-step explanation:

We need two points to find the slope

(1,2) is  one point  (4,4) is another point

m = (y2-y1)/(x2-x1)

m = (4-2)/(4-1)

   = 2/3

The slope is 2/3

We can write the equation in point slope form

y-y1 = m(x-x1)

y-4 = (2/3) (x-4)

Distribute

y-4 = 2/3x - 8/3

Add 4 on each side

y-4+4= 2/3x - 8/3+4

y = 2/3x -8/3+12/3

y = 2/3x +4/3

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 correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total