Well since 19/50 can't be simplified you have to double 9/25 which is 18/50 so then add 18 + 19 = 37 So 18/50 + 19/50 = 37/50 so 37/50 of the students ride the bus or walk to school.
The x-intercepts are indeed -1 and 1.
The increasing intervals are listed as (-1, 0) u (1, infinity) not because -1 and 1 are not included points of the function, but because the function is not differentiable in those points, so you can't tell whether the function is increasing or decreasing there.
Hello,
++++++++++++++++++++++
Answer B
++++++++++++++++++++++
2x²+28x-5=2(x²+2*7x+49)-5-2*48
=2(x+7)²-103
++++++++++++++++++++++++++++++
Ok then after that what’s the question ?