The geometric mean of 1 and a is 9. Find a.

The arithmetic mean of 1 and a is 9. Find a.

4 of her friends and her brother bought marbles her brother lost 2 and only has 7 marbles. How many marbles did they bought

If area of a circle measures 16/25 pi cm square, what is the circumference of the circle in terms of pi

Use the diagram to derive the law of cosines. Which of the following statements is true? b = c cOS A x = a cos C c=h cos A b/x=c/b

Evaluate 5 - t/3 when t = 12

What is the answer to 5+5 (x+4) <20

A recipe for quinoa no calls for 2 and 2/3 cups of milk Connor wants to make four batches of quinoa how much milk does he need

A rental car agency charges a flat fee of $139.00 plus $30.00 per day to rent a certain car. Another agency charges a fee of $13.00 plus $51.00 per day to rent the same car. Find the number of days for which the costs are the same.

How to find the radius of square that tells you length, width, and height.

Ruben has two congruent wooden dowels. He cuts one dowel in two in order to have three pieces to make a triangle. Explain why, despite having three sides, Ruben will not be able to make a triangle with his three pieces.

If John has 13 more Apple than jake and Mary has 26 less that jake and all together they have 236 apples how many Apple does each person have