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)

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

If angle b measures 25°, what is the approximate perimeter of the triangle below? 10.3 units 11.8 units 22.1 units 25.2 units