Perimeter of this shape

20 and 21 please

Afurniture store has 1,500 chairs in storage. a manager uses three delivery receipts to simulate samples to check 100 chairs and note the number of brown chairs. suppose the actual number of brown chairs is 1,080. about how many brown chairs are

Ten times the square of a non-zero number is eqaul to ninety times the number

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units