Algebra question for 6th grade.

The product of three times a number and nine

Melanie spent $40 in 4 hours at the mall. How much money changed hands? I don't understand this question.

A cheese pizza from mulberry st. Is cut into eight equal pieces. Sold individually each slice cost 2.25 what is the cost of an entire pizza at this rate, let cool represent the cost of the entire pizza

A librarian was trying to figure out the number of books in the nonfiction section. The values below represent the numbers of books on each shelf of a corner bookcase.

What is 0.55555 as a fraction

Brandon can swim 1/4 mile in 1/6 hour. At this rate, how far can we swim in one hour?

Y=*^2+4*-5 what is the axis of symmetry?

The circumference of the base of a cylindrical tank is 88m and it is 15m deep. Find how much litres of water can be filled in the tank?

What is the exact value of tan (-pi/3) ?

Jabir buys 2.74 pounds of dried pinto beans and 4.05 pounds of dried lima beans. what is the difference between the wieghts of beans that jabir buys

Tyron and his friends go to a movie theater where large tub of popcorn costs $8.25 and a medium soda costs $3.75 tyrone has $30 to spend on popcorn and soda.