3+6b=6b+5 help please

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.