Angles R and S are vertical angles. Angle R has a measure of (4x+20). Angle S had a measure of 84. What is the value of x?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)

The sum of the abscissa and the ordinate is six