When is a rhombus a rectangle?

À. When its sides are parallel

B. When its angles are convex angles

C. When its angles are right angles

D. When its sides are congruent

Simplify x^3+4y^3-2x^3+2y^3

Find the radius of a circle that had a circumference of 42 feet. Use 3 for pi

Emma's test scores for the last five tests she took were 98, 96, 75, 89, and 91. What was the average score Emma got on her last five tests?

Are integers always whole numbers?

Joey's father stops at the gas station to buy gas. The car has a 16-gallon tank, and the fuel gauge says there is 3/8 of a tank of gas. If Joey's father buys 6 gallons of gas, what fraction of the tank will car's fuel gauge read?

What is the factored form of the polynomial? x2 + 9x + 20 (x - 4) (x - 5) (x - 2) (x - 10) (x + 4) (x + 5) (x + 2) (x + 10)

290 pennies are equal to how many dimes

How can I teach surface area better?

What is the pi of S = (Πr^2) + (2Πr) h

If you have 12 friends and make three equal teams, what fraction do you use?