The temperature measured in kelvin (k) is the temperature measured in celsius (c) increased by 273.15. this can be modeled by the equation k= c + 273.15.

i think it might be a but you might want a second opinion

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

the radius is 2 times the diameter.

step-by-step explanation:

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: