doodleymooc doodleymooc

16-05-2018
Mathematics

contestada

what is X in (3x-12)° on question number 7?

what is X in 3x12 on question number 7 class=

Respuesta :

sqdancefan sqdancefan

23-05-2018

The exterior angle is equal to the sum of the opposite interior angles.
(4x+9) = (2x) + (3x-12)
4x + 9 = 5x - 12 . . . . . . . . collect terms
21 = x . . . . . . . . . . . . . . . .add 12-4x

Then the exterior angle is
(4·21+9)° = 93°

Answer Link

Otras preguntas

Why did early settlements first develop along rivers?

Please help! I dont get it!What role do temperature and salinity play in thermohaline circulation? A.They cause changes in wind direction, which moves denser

1/5 of a gallon of milk poured into 2 separate cups

A building 82 ft high casts a 205-ft shadow. Sarah casts a 10-ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by

Which of the following mutations is least likely to develop into a cancerous tumor? A non-disjunction mutation A chromosomal deletion mutation A inversion c

On a weather map, isobars are lines that connect points of equal air pressure, and letters mark fronts. Please select the best answer from the choices provid

if the metabolism of a cell suddenly slowed down so that it was less cellular energy available which role of the cell membrane would you expect to be the most

Why have archaeologists and historians criticized the building of the Three Gorges Dam?

I am a number between 60 and 70. My digits are consecutive. What number am I?

please help!!!!!!!!!!!

ACCESS MORE