k = 7
Step-by-step explanation:
Because f(1)=9
=> f(1) = (3 x 1^2) + (k x 1) - 1 = 3 + k - 1 = 9
=> k = 7
at home andrea has 1 2/3 kilograms of rice
step-by-step explanation:
i will pick c put check it over to be sure