What is the perimeter of a trapezoid having side lengths of 20 ft, 20 ft, 26 ft and 18 ft?

If the average (arithmetic mean) of 2, 7, and x is 12, what is the value of x?

Insert a pair of parentheses to the expression so that it is equal to 1: 3+8-4x2-10

A cone has a volume of 8 (3.14) cubic feet and a height of 6 feet. what is the radius of the base?

In a survey, 250 out of 1000 people said that they preferred a particular brand of shampoo. What is the result of the survey in percent?

Completely factor the following expression t^2+4tv+4^2

David found and factored out the GCF of the polynomial 80b4 - 32b2c3 + 48b4c. His work is below. GFC of 80, 32, and 48: 16 GCF of b4, b2, and b4: b2 GCF of c3 and c: c GCF of the polynomial: 16b2c Rewrite as a product of the GCF: 16b2c (5b2) - 16b2c

What number should be added to both sides of the equation to complete the square? X^2-10x=7

Y+4=2 what is the answer for y

25.5% as a fraction in simplest forms

A certain junior class has 1,000 students and a certain senior class has 800 students. among these students, there are 60 sibling pairs, each consisting of 1 junior and 1 senior.