Tuesday

September 30, 2014

September 30, 2014

Posted by **Anonymous** on Friday, April 27, 2012 at 9:55pm.

- Geometry -
**Reiny**, Friday, April 27, 2012 at 11:27pm12x + 3x + 7y = 180

15x + 7y = 180

15x + 60 < 180

15x < 120

x < 8

check:

pick a value of x,

1. x < 8 , e.g. let x = 4

then 48+12 + 7y = 180

7y = 120 , so 7y > 60 , OK!

2. x > 8 , e.g. x = 10

then 150 + 30 + 7y = 180

7y = 0 , and 7y > 60 is false

Therefore x < 8 is correct.

**Answer this Question**

**Related Questions**

geometry - find the value of x in each triangle: triangle x has 1 angle at 53 ...

geometry - find the value of x in each triangle: triangle x has 1 angle at 53 ...

math - the sum of measures of the angles in a nonagon is A)1260 degree B)1160 ...

Math - The sum of the degree measures of the angles of a quadrilateral is 360. ...

math - A circle is divided into four segments from the center of the circle. One...

pre-cal - Three forces with magnitudxes 100, 50 and 80 lbs act on an object at ...

Maths - Using the exact trigonometric ratios of 45 degree,30 degree and 60 ...

geometry - If the degree measures of the angles of a triangle are represented by...

Angles,Lines and Triangles - The sum of two angles of a triangle is 116 degree ...

11th Grade Maths - The difference between the two acute angles of a right- ...