2. solve the following system by any method.
8x + 9y = –5
–8x – 9y = 5

a. infinitely many solutions
b. (–10, 3)
c. (0,0)
d. (–3, 10)

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

Which statement best explains why ben uses the width hi to create the arc at j from point k