The ages and grades of some of the 18 girls on a club soccer team are shown in the table which two-way frequency table
15 year old 16 years old
9th grade 2 0
10th grade 10
correctly shows the marginal frequencies?

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.