Hint: Linear functions create straight lines and can be written as y= mx + b .

y=3x+50

Step-by-step explanation:

50 is the inital cost so it is the y intercept or  'b' in the formula. 3 is the slope, the steady rate of change, so it is the 'm' in the formula.

Together the linear equation will be y=3x+50

283 square feet

step-by-step explanation:

good luck

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.