The function f is continuous over -1 a) (x+1)/(x-3)
b) (x-3)/(x+1)
c) (x+1)(x-3)
d)1/(x+1)(x-3)

i think c. but don't trust it.

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.