Which kind is perpendicular to a line that has a slope of 1/2

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers