Which figure must be a rhombus?

A. a quadrilateral with four right angles

B. a parallelogram with four congruent sides

C. a quadrilateral with congruent diagonals

D. a parallelogram with four congruent angles

The Jackson family is putting down flooring in part of their basement. The floor in this part of the basement measures 10 feet wide by 20 feet long. The flooring that they want to use costs $2 per square foot.

A $25 increase followed by $30 decrease same as original less than original or greater than original

Elizabeth has two ribbons. One is 1/7 foot long. The other is 2/5 foot long. Write them with a common denomitator

What is the least common denominator of 7/x^2 7/5x explain

Michael started a savings account with $300 after four weeks he had $350 and after nine weeks he had $400 what is the rate of change of money in a savings account per week

Solve for b. 8b-1=24b+4

876.34 rounded to the nearest thousandth

A triangle in the xy-coordinate plane has vertices with coordinates (7, 0), (0, 8), and (20, 10). what is the area of this triangle

What is the value of the product (3 - 2i) (3 + 2i) ?

Rae and Tory shared a pizza. The models show the fraction of the pizza each of them ate. What fraction of the pizza did Rae and Tory eat altogether