Chứng minh rằng nếu đối với hàm tuyến tính f(x) = ax + b
các giá trị của đối số x = xn (n = 1, 2, ...) lập thành một cấp số cộng, thì
các giá trị tương ứng của hàm yn = f(xn)(n = 1, 2, ...) cũng lập thành cấp số
cộng

Phillip had some bricks. he stacked them in 6 equal piles. which expression shows the number of bricks phillip put in each pile? let the variable m stand for the unknown number of bricks. m + 6 m÷6    m−6    6m

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet