A square has vertices (c, c) (2c,2c) and (2c,0) find the fourth vertex

Aparallelogram has an area of 216.24 cm2 and a height of 15.9 cm. how long is the base of the parallelogram? enter your answer as a decimal in the box. cm

Afurniture store is having a weekend sale and is offering a 20% discount on patio chairs and tables the sales tax on furniture is 6.25%

The product of 3 and a number increased by 8 is 31