The sum of three numbers is 9.the first number minus the second plus the third is 3. the first minus the third is 1 more than the second. find the number

If a • b*2 = 1.8 x 10*-7, and c•b/d = 7.2 x 10*-4, find the value of a•d*2/c*2

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

The quadratic function h(t)=-16.1t^2+150 choose the graph representation