Answer:
summation
Step-by-step explanation:
This symbol is the summation symbol
It means to sum what comes after it
Answer: y=66
I hope it helps you!
Answer:
Step-by-step explanation:
The sum of the angles is ...
x° + (x +8)° + 2x° = 180°
4x +8 = 180 . . . . . . . . . . . collect terms, divide by °
x +2 = 45 . . . . . . . . . . divide by 4
x = 43 . . . . . . . . . . subtract 2
x +8 = 51
2x = 86
The angles are 43°, 51°, 86°.
Answer:
the third one
Step-by-step explanation:
the third one
Mona subtracted 5 where she should have divided 5. If the equasion was. x+5=30 then she would have subtracted 5.
