Which equation is not equivalent to the formula r = st?

a.) s = r/t
b.) t = r/s
c.) s = t/r
d.) r = ts

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together

Solutions for 2x+7 less than or equal to 3x-5

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.