Prove that (a-b) x (a+b) = 2a x b is true. (a and b are vectors)

What is 6.7 in two other forms

How can you find the area of parallelograms rhombuses and trapezoids?

Find the nth term of this sequence 3 8 13 18 23

In a different city grade class the radio of boys to girls is 3:2 how many boys in how many girls their B in this class is there more than one possible answer explain

What is the sum of the geometric sequence 3, 15, 75, ... if there are 8 terms? 39,062 58,593 195,312 292,968

Isabelle desperately wants an I-Pod Touch. After researching on-line she discovers the l-Pod she wants is $300. After begging her parents to buy the l-Pod for her, they make a deal with Isabelle.

A bag contains 1 red, 2 yellow, 3 white, and 3 pink jelly beans. If one jelly bean is drawn find p (yellow)

Solve the equation 15.625 = s3 to find the length of one side of the container

Another order calls for 26 widgets. The widgets comes in boxes of 5. How many full boxes of 5 do you pull? How many single items do you still need?

How many natural numbers are there in 500²and501²