Find the missing angle.

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The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10