Which relation is quadratic?
a. y = x^2 - x^2 + 4x + 2
b. y = (2x^2)(x + 1)
c. y = (x + 5)^2
d. y = 2x - 6x + 3

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.

How many grams must be adde to 970g to make 1 and a half kg