Perform the indicated operation. Write the result in the form a + bi.(4 + 
) (5 + 
)
A. 20 - 
+ 4¡
+ 5¡ 
B. 10 - 9¡
C. 20 + 
- 30¡
D. 30 + 90i
Answer: A
You might also like to view...
Between 1995 and 2005, each year the number of Internet domain hosts was 1.41 times the number of hosts in the preceding year. In 1995 the number of hosts was 8.7 million.
?
A: Explain why the number of domain hosts was an exponential function of time over the period from 1995 to 2005..
?
B: Write a formula that gives the number D, in millions, of domain hosts t years after 1995.
?
?
C: Make a graph that shows the growth of domain hosts from 1995 to 2005, that is, for 
to 
.
?
D: According to this model, when did the number of domain hosts reach 23 million? Round your answer to two decimal places.
What will be an ideal response?
Solve the problem.A plane flies 440 miles with the wind and 330 miles against the wind in the same length of time. If the speed of the wind is 22 mph, what is the speed of the plane in still air?
A. 179 mph B. 154 mph C. 159 mph D. 144 mph
Solve the problem.Six freshmen move into a dormitory suite at the beginning of the semester. In order to get to know one another, they decide to have breakfast in pairs for the next few days, each student having a different breakfast partner each day until each student has had breakfast with all other students exactly once. Draw a graph with vertices representing students and edges representing breakfast dates. How many breakfasts will occur? How many days will the process take?
What will be an ideal response?
Simplify the rational expression. If the rational expression cannot be simplified, so state.
A. 
B. 
C. cannot be simplified
D. 