A student solved the problem below but made an

error.

- 3x = 12

+3 + 3

x = 15

At a pet store the ratio of cats to dogs sold was 5:4 if there were 10 cats that were sold, how many dogs were sold?

arc commutes to work on his bicycle, which has tires that measure 26 inches in diameter. A device on his bike informs him that one tire completed 388 full rotations between the time he left his house and the time he arrived at work.

What is 7/15 multiply 12/x

A pantry has 56 cans of vegetables and 74 cans of soup. each shelf in the pantry can hold 9 cans. will all the cans of soup fit evenly on the shelves? how many shelves will be needed? is there a remainder?

Which numerical expression is equivalent to 2-2 x 2-3?

A recipe for brownies calls for 4 eggs and 1 1/2 cups of flour. If the recipe makes 15 brownies, how many cups of flour will be needed to make 60 brownies?

A rectangular table measures 48 inches wide and 60 inches long. a tablecloth covers the table and hangs over the edge by 10 inches on each side. what is the area of the tablecloth measured in square inches

Missing lenght on the right side. solve for c. 8", 6" = c

What is the difference Of these mixed numbers 7 4/6 - 4 1/6

At the end of February there are 692 houses in our town. Some new house are built in March. At the end of March there are 967 houses. How many houses are built in March?