Which function has a vertex at the origin?
f(x) = (x + 4)?
f(x) = x(x-4)
fx) = (x – 4)(x + 4)
f(x) = -x

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?