25 - (10 = 5) =

1. 3
2. 5
3.20
4. 23

Please help me:)

Rearrange the formula c^2 = a^2 + b^2 for b

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes