Agardner uses 1/3 of a liter of water to water 2/7 of a garden. watering the entire

(1/3) / (2/7) = x / 1
cross multiply
(2/7)(x) = (1/3)(1)
2/7x = 1/3
x = 1/3 * 7/2
x = 7/6 = 1 1/6 liters

Use " ^ " to denote exponentiation:     f(x) = x^2 + 4x – 12.to find the x-intercepts, or the roots, or the zeros, set this quadratic = to 0 and solve for x: x^2 + 4x – 12 = 0completing the square,  x^2 + 4x + 4 - 4 – 12 = 0                                          (x+2)^2 = 16x+2 = plus or minus sqrt(16) = plus or minus 4.then the roots are -2+4 and -2 - 4, or 2 and -6.the x-intercepts are (2,0) and (-6,0).