How can you find a unit rate when given a unit?

Can you draw an isosceles triangle with only one 80 degree angle?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

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: