When dividing complex numbers, why do you need to multiply the numerator and denominator by the complex conjugate of the denominator?

What is the sum of 6 feet 10 inches and 8 feet 9 inches? A. 14 ft. 7 in. B. 15 ft. 7 in. C. 13 ft. 19 in. D. 15 ft. 19 in

an art teacher has one and a half pounds of red clay and 3/4 pounds of the yellow clay the teacher mixes the red play and yellow clay together each student in the class needs one eight pounds of the clay mixture to finish the assigned art project

Ninety-six passengers rode in a train from City A to City B. Tickets for regular coach seats cost $127. Tickets for sleeper cars seats cost $290. The receipts for the trip totaled $20,179. How many passengers purchased each type of ticket?

Sam is collecting pennies. On the first day of the month, Sam is given 11 pennies. Each day after than he gets 7 more pennies. Which of the following equations defines how many pennies he has after the nth day? A. an = 7n + 4 B. an = 11n + 7 C.

For every 24meals Momoka prepared for customers last night, she prepared 2 meals for employees. Momoka prepared 156 meals. How many meals did Momoka prepare for customers and for employees last night?

If the radius of a circle is 6in., what is the diameter and circumference of the circle

The ratio of fishing boats to sailboats in a bay is 8:3. There are a total of 24 sailboats in the bay. How many fishing boats are in the bay?

4,140 inches is how many yards

Jane is 3 years older than mary, and mary is twice as old as kay. if kay is x years old, how old is jane?

Which expression is equivalent to 1.7 - 0.5 (0.2x - 1.6) ? A) 2.5 - 0.1x B) 0.9 - 0.1x C) 0.1x - 0.9 D) 0.1x - 2.5