Trying to get rid of points. 99pts. perform the indicated operations: (2/x-2)+(x/x++20/x^2+7x-18)

The answer is -2(4x^3+5x^2-x+20)/x^2

I mis-read the question. The answer should be (x+1)/(x+9)

Step-by-step explanation:

(2/x-2)+(x/x+9)-(x+20/x^2+7x-18)

= 2/x-2+1+9-(20/x^2+8x-18)

=2/x+8-(20+8x^3-18x^2)/x^2

=(2x+8x^2-20-8x^3-18x^2)/x^2

=(-8x^3-10x^2+2x-20)/x^2

=-2(4x^3+5x^2-x+20)/x^2

I mis-read the question and it should be:

(2/(x-2))+(x/(x+9))-(x+20)/(x^2+7x-18)

=(2(x+9)+x(x-2) / (x-2)(x+9) - (x+20) / (x-2)(x+9)

=(2x+18+x^2-2x-x-20) / (x-2)(x+9)

=(x^2-x-2) / (x-2)(x+9))

= (x+1)(x-2) / (x-2)(x+9))

=(x+1)/(x+9)

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.