What is the value of ∑^3 = 4 x 1/2 i-1

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Place the following steps in order to complete the square and solve the quadratic equation,