Across
1
Sum divided by count
5
Line crossing from corner to corner
7
Single numeral from 0 to 9
8
U-shaped curve of a quadratic function
9
Symbol representing unknown value
13
Result of multiplication
14
Corner point of a polygon
Down
2
Number less than zero
3
Power to which a number is raised
4
Rectangular array of numbers
6
Difference between highest and lowest values
10
Result of raising a number to an exponent
11
Round shape with all points equidistant
12
Math using letters for unknown values