Evaluate the expression (1 + 2 i) - (1 - 4i) (1+2i) - (1-4i) and write the result in the form a + b i a+bi.

The hyperloop would be able to travel 1,050 miles in 1 1/2 hours. how long would it take the acela train to travel that far?

M+5n=7 how to solve equation

Solve each inequality and graph it's solution 7x < / = 140

Diane uses 2 feet of ribbon to decorate each gift she is wrapping. She wraps 7 gifts. How much ribbon does she need?

What is x^2+1 in factored form?

B. Henry lives 95 km from work. How many kilometres does he drive to and from work each week? c. Henry uses 9 litres of fuel for each trip. (18 litres per day) How many litres of fuel does he use each week? d.

How many milligrams is required for a patient weighing 204 pounds

A high school has a total of 850 students. there are 60 more females students than male students. a. write a system of linear equations that represents this situation. b. how many students are female? male?

There are 6 chocolate, 4 strawberry. and 5 vanilla ice. what is the probability that an ice cream chosen at random is a chocolate flavor

The height h (in feet) above the water of a cliff diver is modeled by h=-16t2+8t+80, where t is the time (in seconds). How long is the diver in the air?