Which variable is most important to the following problem?
dorothy played the first 17 minutes of the hockey game. evelyn then replaced
her for the rest of the half. evelyn started the second half and was replaced by
dorothy with 21 minutes left in the game. if each half is 45 minutes long, how
long did evelyn play during the second half?

a. the length of a half
b. the number of minutes dorothy played in the second half
c. the number of minutes evelyn played in the second half

a² + b²= c²

24² + 7² = c²

c= 25

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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step-by-step explanation:

it is only things thain can be deafeated

step-by-step explanation: