In grouped data each of the group is called?

In which form is the following function written? y = - 2(x – 3)(x + 5)

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2

Which fraction represents the ratio 35 : 42 in simplest form