Keep doing each step manually, and see where it slips up:
−7.9+8.2−3.4+2.1=−1
−7.9+8.2+(−3.4)+2.1=−1
−7.9+(−3.4)+8.2+2.1=−1
(−7.9+(−3.4))+(8.2+2.1)=−1
−11.3+10.3=−1
Answer Is a
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Answer:
add 4 on both sides
Step-by-step explanation:
degree to radian = angle in degree * pi/180
rad = 150 * pi/180 = 2.618 radians
