Which combination of numbers in this group has the highest value?
4 + (-4)
4*|-2|
-4 * |2|
| -4 | * (-2)
4 + 2

Simply 8x squared + 5(7x squared- x) - 2x =

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?

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a