Which statements are true about the parabola represented by the equation y=3x^2−15x+30? Select all that apply.

The leading coefficient is negative, so the parabola opens down.
The parabola has a maximum.
The parabola has a minimum.
The leading coefficient is positive, so the parabola opens up.

20 points for the answer. this is for real , don't put random ! a rectangle has a length of 4 centimeters and a width of 7 centimeters. what is the effect on the perimeter when the dimensions are multiplied by 5? the perimeter is increased by a factor of 5. the perimeter is increased by a factor of 20. the perimeter is increased by a factor of 25. the perimeter is increased by a factor of 100.