To rent a jet ski the Delta Water company charges a flat fee of $25 plus $7.50 per hour. If you rented a jet ski for a day of fun and were charged $70, how many hours did you rent the jet ski for? ASAP
PLS HELP Thx!

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

Alogical argument that is presented in graphical form using boxes and arrows is called?