Ánh xạ f nào sau đây không là ánh xạ tuyến tính a. f(x₁,x₂) = (x₁,x₂)

b. f(x₁,x₂) = (0,0)
c. f(x₁,x₂) = (x₂,x₁)
d. f(x₁,x₂) = (1,2)

Which set of reflections would carry trapezoid abcd onto itself? a) x-axis, y=x, y-axis, x-axis b) x-axis, y-axis, x-axis c) y=x, x-axis, x-axis d) y-axis, x-axis, y-axis, x-axis

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3