4n-40=-14n+14 how do i solve this ?

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:

With both problems. a.s.a.p directions on photo ^

What is 10+10+20 about the origin the square root of a triangle.