Frankie can build a speaker box in 120 minutes. tisha can build a speaker box 40 minutes faster. if they work together, how many minutes does it take them to build the speaker box?
240 minutes
80 minutes
48 minutes
40 minutes

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Yvaries inversely as x. y =12 when x=5. find y when x=4

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.