Which of the following equations is of a parabola with a vertex at (0, 3)? The graph of y = x 2 is changed to y = x 2 - 3. How does this change in the equation affect the graph?

The parabola shifts 3 units up.
The parabola shifts 3 units down.
The parabola becomes 3 units wider.
The parabola becomes 3 units narrower.

Select the two pairs of figures that are similar.

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.

Hassan bought a package of tofu. the temperature of the tofu was 14° celsius when hassan put the package into the freezer. he left the tofu in the freezer until it reached –19° celsius. which expressions explain how to find the change in temperature, in degrees celsius, of the package of tofu? select three that apply.