Which expression is equal to - 2i (-9 6i)

a. - 12 18i

b. 18-12i

c. 12 18i

d. 18 12i?

If it takes 4 men 6 hours to repair a road, How long will it take 7 men to do the job if they work at the same rate? A) 2 5/7 hours B) 3 2/7 hours C) 3 3/7 hours D) 3 5/7 hours

What is 9a+2b+14-7a+5b+4

Adrian's annual income changes every year because of the following three factors: On average, his salary is 1.2 times the previous year's salary. 30% of his income is budgeted for rent.

What does the thickened outer crust represent?

the degree measure of an angle is defined as the length of the corresponding arc on the unit circle. True/False

recently 5/8 of the items sold at Debbies Sporting Good were baseball caps. at Sasha Sports 7/10 of the items sold were baseball caps which store sold a greater fraction of baseball caps?

You want to find the height of a tower used to transmit cellular phone calls. You stand 100 feet away from the tower and mesure the angle of elevation to be 40°. How high is the tower to the nearest foot

A helicopter leaves central airport and flies north at 180 mi/hr. Twenty minutes later a plane leaves the airport and follows the helicopter at 330mi/hr. How long does it take the plane to overtake the helicopter

A rectangular piece of paper with length 29 cm and width 12cm has two semicircles cut out of it. Find the area of the paper that remains.

Kent earns $49,000 a year and has to pay $45 in taxes for every $1,000. How much taxes does he pay in one year? A. $2,049 B. $2,000 C. $2 205 D. $1,000