HAVING BAD DAY FREE 5o POINTS IF CORRECT anna is x years old and her sister jane is y years old what will the sum of their ages be in 3 years

S = x+y+9

Step-by-step explanation:

Age of Anna is x years and age of her sister is y years old.

3 years later,

Age of Anna = x+3

Age of her sister = y +3

Sum of their ages in 3 years will be :

S = x+3+y+3

S = x+y+9

Hence, this is the required solution.

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.

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