How to solve x in a trapezoid

Given a standard deck of 52 cards, 3 cards are dealt without replacement. Using this situation, answer the questions below.

Robert decided to use blocking to deal with an extraneous factor in his experiment. What will blocking do to the subjects in his experiment? A. Divide them into groups based on whether he likes them B.

Which right triangular prism has the greatest volume? A triangular prism. The triangular base has a base of 7 meters and height of 9 meters. The height of the prism is 6 meters. A triangular prism.

The sum of two numbers is 50. Two times the smaller number exceeds the larger number by 31. Find the numbers.

On Saturday, April 5th, Sena the baby giraffe was born at the Fresno Chaffee Zoo. At birth, she weighed 125 pounds. If she gained 96 ounces one week after her birth, how many pounds would she weigh all together at the end of her first week?

Express the area of each figure as a monomial. Solve 7x^4 if the formula is s^2.

A chess board is an 8 by 8 grid of squares. If you randomly choose 3 squares on the board, what is the probability that: a) they lie on the same line, excluding diagonal lines? b) they lie on the same line. including diagonal lines?

A marble bag contained 2 red marbles, 3 blue marbles, and 5 yellow marbles. Marco drew a blue marble and did not replace it. What is the probability of drawing a blue marble next?

An 85-foot rope from the top of a tree house to the ground forms a 45 degree angle of elevation from the ground. How high is the top of the tree house?

Find the area of an equilateral triangle with an apothem of 7