The temperature was 80°F and then fell 20°F. Which number line diagram could be used to represent this situation?

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

Indicate the equation of the given line in standard form. the line containing the longer diagonal of a quadrilateral whose vertices are a (2, 2), b(-2, -2), c(1, -1), and d(6, 4).

7x^2-9x+5=0 find the discriminant and number of real solutions