1 x 10 = 10
16 x 1 = 16
10 + 16 =
26
27, just multiply30 by 9/10
1530 ÷ 29.24 = 52.3256
i am a mathematics teacher. if anything to ask please pm me

The Quadratic Function has the domain as the set of all real numbers.
For the range, start from minimum value to maximum value.
But because the parabola is downward as a < 0. Thus, there are no minimum value but the maximum value instead.
Therefore the range is y <= -4