Evaluate -3 a parentheses 2b minus 4C parentheses a equals negative 3 B equals two and C equals -7

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

How many times larger is 6 × 10^12 than 2 × 10^7? a. 30,000 b. 3,000 c. 3,000,000 d. 300,000

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.