Which of the following are the coordinates of the vertex of y=3x^2+3?

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Using elimination, what is -4x+2y=-12 4x+8y=-24