An A4 paper measures 297 x 210 mm and is marked "100 grams per square metre." What is the best estimate of the weight of one sheet? The pack contains 240 sheets.

The axis of symmetry for the graph of the function f(x)=1/4^2+bx +10 is x=6. what is the value of b?

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

Select all of the quadrants that the parabola whose equation is y=√x-4 (principal square root) occupies. i ii iii iv