Given a quadratic function, y = a x squared + b x + c, what happens to the graph when "a" is positive? a. the parabola opens down, the vertex is the maximum value c. the parabola opens up, the vertex is the maximum value b. the parabola opens down, the vertex is the minimum value d. the parabola opens up, the vertex is the minimum value Please select the best answer from the choices provided A B C D

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.

The sum of two numbers is 12 and their difference is 18 what are the two numbers

Anyone know these questions? i need ,.