HELLPPP ASAP PLEASE ELECTRICITY The impedance in one part of a series circuit is 7 + 8j ohms, and the
impedance in another part of the circuit is 13 - 4j ohms. Add these complex numbers
to find the total impedance in the circuit.

PLEASE HELP ASAP

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.