Find the lenght of the diagonal of a rectangle with side 7cm and 8cm

What is the missing constant term in the perfect square that starts with x^2 -20x

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units

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: