Cari simplifies the expression (5 + 4) 2− 5 × 2. Part A Cari shows her work on the board. Use numbers and words to explain her mistake. (5 + 4) 2− 5 × 2 (5 + 16) − 5 × 2 21 − 5 × 2 16 × 2 32

Rounding decimals is very similar to rounding other numbers. if the hundredths and thousandths places of a decimal is forty-nine or less, they are dropped and the tenths place does not change. for example, rounding 0.843 to the nearest tenth would give 0.8. , your welcome !

Number nine is f(x)= 40x : ) hoped i ya