Which quadratic equation is equivalent to (x + 2)^2 + 5(x + 2) - 6 = 0?

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

Solve the triangle. a = 21°, c = 105°, c = 5

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in