With a sample size of 200 adults what is probability that more than 35% have high blood pressure

The sum of the product of 4 and x and the product of 7 and y is 61. the sum of the product of 12 and x and the product of 21 and y is 61. what are the values of x and y?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?