30 items cost 1920 yen. If pencil cost 40 yen and pen cost 30 yen more then pencil. How many of each did he bought

2. Original price is 60; new price is $45. 4. Original number of acres is 32; new number of acres is 16.

Roberto has been studying a type of bacteria that doubles every month. Originally, there were 3 bacterial cells. He wants to know how many there will be after 43 months. Which equation should he use?

Which expressions are equivalent to 12 r - - - 5?

Eight times the sum of 11 and a number is 123. Which equation can be used to find the unknown number?

Six treasure chests were found on a sunken pirate ship. In the first four chests, among other things, there were 60, 30, 20 and 15 gold coins.

A company rents vans for a rental fee of $18.00 per day with an additional charge of $0.45 per miles that a can is driven. Write an equation the represents the cost (c) of renting a van for one day and driving (m) miles.

How do you factor out the trinomial: 6x²+14x+4

What will be the shape of the model for 10000

Expand the expression In (2x^3/5y)

Dr. Casey has a cylindrical beaker he fills with about 113 cubic inches of hydrochloric acid. The hydrochloric avid has a height of 4 inches in the beaker. To the nearest inch, what is the diameter of the hydrochloric acid in Casey's container?