What are two types of sampling methods

Sin²A = 1 + cos²A 1 - cos²A cos²A - 1

Which is the best definition of a quadrilateral? A (A four sided polygon with no equal sides B (a parallelogram with no equal sides C (A four sided polygon D (A parallelogram with two pairs of equal angles P.

What is the product of (x + 1) / (b2x2 + b2) and b2 / (x + 1) expressed in simplest form? A) 1 / (x2 + 1) B) x2 + 1 C) b2 / (x2 + 1) D) 1 / (x2 + b2)

The amount of a persons paycheck p varies directly with the numbers of hours worked t. for 25 hours of work, the paycheck is $312.50write a equation for the relationship between hours of work and pay

Claire's mother is 4 years more than twice Claire's age. The sum of their ages is 58 years. Claire's age is years, and her mother's age is years

Grace and Max worked together on a math problem. they had a rectangle piece of paper that 14 inches long and 11 inches wide they where asked to cut this piece of paper into 1/8 inches wide strips using the length of paper how many 1/8 inches wide

If s (x) = 2 - x2 and t (x) = 3x, which value is equivalent to (s. t) (-7)

Kevin and his sister, katy, are trying to solve the system of equations. Keven thinks the new equation should be 3 (6x-1) + 2y=43, while katy thinks it should be 3x+2 (6x-1) = 43. Who is correct and why

If 4x=32 find the value of 35-5x

On Saturday, a local hamburger shop sold a combined total of 520 hamburgers and cheeseburgers. The number of cheeseburgers sold was three times the number of hamburgers sold. How many hamburgers were sold on Saturday