John has 2,456 in his coin collection. he has the same number of pennies in each of 3 boxes. estimate to the nearest hundred the number of pennies in each box.

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read