Two or more angles are supplementary if their sum is 180. An angle is twice the size of its supplement. Set up and solve an equation to find the measures of the two angles.

Step-by-step explanation:

Let "a" represent the measure of the angle. Then 180-a is the measure of its supplement. Your equation can be ...

  a = 2(180-a) . . . an equation

  a = 360 -2a . . . . eliminate parentheses

  3a = 360 . . . . . . add 2a

  a = 120 . . . . . . . . divide by 3 to find "an angle"

  180-a = 60 . . . . . find "its supplement"

The measure of the angle is 120°, of its supplement, 60°.

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

320ft

step-by-step explanation:

120 divided by 3 equals 40

40 times 4=160

160 times 2=320