Lúc 6 giờ 45 phút một xe máy đi từ A về B với vận tốc 36 km\giờ đến 8 giờ 15 phút 1 ô tô cũng từ A về B(theo đường xe máy chạy)và đuổi theo xe máy với vận tốc 54km/giờ.Hỏi ô tô đuổi kịp xe máy lúc mấy giờ

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9