If the degree measure of an angle is 40° less than 3 times the degree measure of its supplementary angle, what is the degree
measure of the angle?
a 50°
b. 55°
c.125°
d. 130°

Step-by-step explanation:

The degree measure of the angle is our unknown, so we will call it x.  Taking the written words and putting them together in an equation looks like this:

x = 3(180 - x) - 40

This says "the unknown angle" {x} "is" {=} "3 times the degree measure of its supplementary" {3(180 - x)} and is also "40 degrees less" than this, so {-40}.

x = 540 - 3x - 40 and

x = 500 - 3x and

4x = 500 so

x = 125

Choice C.

answer: given that the roller coaster can accommodate 1600 riders per hour, thus the roller coaster can accomodate 1600 / 60 = 26.67 riders per minute.

given that there are 345 people in the line, the number of minutes it will take for the 345 persons to get into the roller coaster is given by 345 / 26.67 = 12.94 minutes.

therefore, it will take you 12.94 minutes to get to the front of the line.

step-by-step explanation: