Astudent solved this problem by making a table.

arturo has $120. max has $90. in how many years will they both have the same amount of money if arturo saves $90 per year and max saves $100?

arturo $120 $210 $300 $390
max $90 $190 $290 $390
year 0 1 2 3

here is a problem that can also be solved by making a table.

amira has $80. sasha has $40.

in how many months will they both have the same amount of money if amira saves $40 per month and sasha saves $50?

months

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.