Trong 10 giờ SX được 20 SP, có tổng giá trị là 100 USD. Hỏi: Tổng giá trị SP làm ra trong ngày là bao nhiêu và giá trị của một sản phẩm là bao nhiêu, nếu:
a. Năng suất lao động tăng lên 2 lần
b. Năng suất lao động giảm 2 lần
c. Cường độ lao động tăng lên 2 lần
d. Cường độ lao động giảm 2 lần

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Someone answer asap for ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?