Which measures could be the side lengths of a right triangle? 3 cm, 5 cm, 9 cm
7 cm, 21 cm, 25 cm
7 cm, 25 cm, 26 cm
30 cm, 72 cm, 78 cm

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?