How do you turn 19/8 into a whole number

What is the exact value of cos (-pi/2)

1) What is the domain of the relation { (-2,4), (-1,5), (-1,6), (0,5) } A) {-2,-1,0} B) {-2,-1} C) {2,4,5} D) {4,5,6} 2) What is the domain of y=√x .

A plane flies around trip to Philadelphia it flies to Philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Donovan is painting a large wall orange. Yesterday, he painted a square-shaped area that was 7x square feet. Today, he extended one side of the orange area by 3 feet and the other consecutive side by 4 feet.

What number completes the lists of prime factors for 18? 2.3.?

Which expression represents the number of possible combinations of n items taken r at a time?

Numbers that are greater than 5 and less than 5.75

Which best describes a triangle with angle measures of 58 degrees 47 degrees and 85 degrees?

Darryl is a plumber. He charges $35 to make a service call and $20 an hour for any repairing. Write an algebraic equation relating Darryl's charge to the total number of hours of labor required.

4x+3y-1=0 and 3x-y+2=0, find slope