Problem solving with fractions

What is 45 + (-15) + 7

there are 425 people in the auditorium they are sitting in rows of 9 how many rows have 9 people sitting down?

Convert from fraction to decimal 7/9

Find the slope of any line that is perpendicular to the line whose equation is x+y=12c

It costs $60 to reserve a movie theater for a party. There is also a charge of $3 for each person. Write an expression that represents the total cost to reserve a movie theater for (n) persons?

100,000 randomly selected adults were asked whether they drink at least 48 oz of water each day and only 45% said yes. identify the sample and population.

Write the solution to the inequality in set - builder notation: 5r + 8 < 63

Which is the best buy, a 6-pack of soda that cost $2.70 or a soda that cost 0.50 each

What does 11111 times 3344?

Find the least number of cables required to connect eight computers to four printers to guarantee that for every choice of four of the eight computers, these four computers can directly access four different printers. Justify your answer.