-4x-15y=-17
-x+5y=-13

How many days was the temperature above 90 degrees?

If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0

Aright triangle can also be a(n) triangle.