Sue can clean the room in 45 minutes. ann can clean the room in 1 hour. sue cleaned for 15 minutes before ann came to her. how long did they work together to finish cleaning? write answer in fraction then write in decimal.

They will work for minute minute  together to finish the work.

Step-by-step explanation:

In 45 minutes Sue cleans the whole room

So, in 1 minute Sue does part of the total work -------(1)

so in 15 minutes Sue does

                    = part of the total work -------------------------(2)

So, the amount of work left, = (1 - 1/3)  

                                              = 2/3 of the total work.

In 60 minutes, Ann cleans the whole room

so,in 1 minute Ann does of the total work.

So, in 1 minute, Ann and Sue together do,

                                                    =

                                                    =  of the total work.

So, Ann and Sue together do  of the total work in 1 minute.

So, they would have done  the whole work in, minute.

So, they would do of the total work in

  minute

  = minute

  = minute

  minute

c

step-by-step explanation:

because of the levels

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

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