1) write the expression in standard form.

7/ 3-15i

a. 7/78 - 35/78i

b. -7/78 - 35/78i

c. 7/78 + 35/78i

d. -7/78 + 35/78i

2) find the product of the complex number and its conjugate.
1 + 3i

a. 1 + 9i

b. 10

c. -8

d. 1 - 9i

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?

In which quadrant does the point lie? write the coordinates of the point. a. quadrant ii; (–2, –4) b. quadrant iii; (2, 4) c. quadrant iii; (–2, –4) d. quadrant iv; (–4, –2)