Help help help help I’m being serious I need this done please don’t mess around and give me a full honest answer I’ll give points thanks

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240